Encrypted messaging app Signal has pushed back against "viral reports" of an alleged zero-day flaw in its software, stating it found no evidence to support the claim.
"After responsible investigation *we have no evidence that suggests this vulnerability is real* nor has any additional info been shared via our official reporting channels," it said in a series of messages posted in X (formerly
Microsoft has released its Patch Tuesday updates for October 2023, addressing a total of 103 flaws in its software, two of which have come under active exploitation in the wild.
Of the 103 flaws, 13 are rated Critical and 90 are rated Important in severity. This is apart from 18 security vulnerabilities addressed in its Chromium-based Edge browser since the second Tuesday of September.
The two
Microsoft has linked the exploitation of a recently disclosed critical flaw in Atlassian Confluence Data Center and Server to a nation-state actor it tracks as Storm-0062 (aka DarkShadow or Oro0lxy).
The tech giant's threat intelligence team said it observed in-the-wild abuse of the vulnerability since September 14, 2023.
"CVE-2023-22515 is a critical privilege escalation vulnerability in
Apple on Wednesday rolled out security patches to address a new zero-day flaw in iOS and iPadOS that it said has come under active exploitation in the wild.
Tracked as CVE-2023-42824, the kernel vulnerability could be abused by a local attacker to elevate their privileges. The iPhone maker said it addressed the problem with improved checks.
"Apple is aware of a report that this issue may have
Atlassian has released fixes to contain an actively exploited critical zero-day flaw impacting publicly accessible Confluence Data Center and Server instances.
The vulnerability, tracked as CVE-2023-22515, is remotely exploitable and allows external attackers to create unauthorized Confluence administrator accounts and access Confluence servers.
It does not impact Confluence versions prior to
The three zero-day flaws addressed by Apple on September 21, 2023, were leveraged as part of an iPhone exploit chain in an attempt to deliver a spyware strain called Predator targeting former Egyptian member of parliament Ahmed Eltantawy between May and September 2023.
"The targeting took place after Eltantawy publicly stated his plans to run for President in the 2024 Egyptian elections," the
Apple has released yet another round of security patches to address three actively exploited zero-day flaws impacting iOS, iPadOS, macOS, watchOS, and Safari, taking the total tally of zero-day bugs discovered in its software this year to 16.
The list of security vulnerabilities is as follows -
CVE-2023-41991 - A certificate validation issue in the Security framework that could allow a
Microsoft has released software fixes to remediate 59 bugs spanning its product portfolio, including two zero-day flaws that have been actively exploited by malicious cyber actors.
Of the 59 vulnerabilities, five are rated Critical, 55 are rated Important, and one is rated Moderate in severity. The update is in addition to 35 flaws patched in the Chromium-based Edge browser since last month's
Adobe's Patch Tuesday update for September 2023 comes with a patch for a critical actively exploited security flaw in Acrobat and Reader that could permit an attacker to execute malicious code on susceptible systems.
The vulnerability, tracked as CVE-2023-26369, is rated 7.8 for severity on the CVSS scoring system and impacts both Windows and macOS versions of Acrobat DC, Acrobat Reader DC,
Mozilla on Tuesday released security updates to resolve a critical zero-day vulnerability in Firefox and Thunderbird that has been actively exploited in the wild, a day after Google released a fix for the issue in its Chrome browser.
The shortcoming, assigned the identifier CVE-2023-4863, is a heap buffer overflow flaw in the WebP image format that could result in arbitrary code execution when
Apple on Thursday released emergency security updates for iOS, iPadOS, macOS, and watchOS to address two zero-day flaws that have been exploited in the wild to deliver NSO Group's Pegasus mercenary spyware.
The issues are described as below -
CVE-2023-41061 - A validation issue in Wallet that could result in arbitrary code execution when handling a maliciously crafted attachment.
CVE-2023-41064
The U.S. Federal Bureau of Investigation (FBI) is warning that Barracuda Networks Email Security Gateway (ESG) appliances patched against a recently disclosed critical flaw continue to be at risk of potential compromise from suspected Chinese hacking groups.
It also deemed the fixes as "ineffective" and that it "continues to observe active intrusions and considers all affected Barracuda ESG
Software services provider Ivanti is warning of a new critical zero-day flaw impacting Ivanti Sentry (formerly MobileIron Sentry) that it said is being actively exploited in the wild, marking an escalation of its security woes.
Tracked as CVE-2023-38035 (CVSS score: 9.8), the issue has been described as a case of authentication bypass impacting versions 9.18 and prior due to what it called an
A sophisticated Facebook phishing campaign has been observed exploiting a zero-day flaw in Salesforce's email services, allowing threat actors to craft targeted phishing messages using the company's domain and infrastructure.
"Those phishing campaigns cleverly evade conventional detection methods by chaining the Salesforce vulnerability and legacy quirks in Facebook's Web Games platform,"
Apple has rolled out security updates to iOS, iPadOS, macOS, tvOS, watchOS, and Safari to address several security vulnerabilities, including one actively exploited zero-day bug in the wild.
Tracked as CVE-2023-38606, the shortcoming resides in the kernel and permits a malicious app to modify sensitive kernel state potentially. The company said it was addressed with improved state management.
"
Zero-day vulnerabilities in Windows Installers for the Atera remote monitoring and management software could act as a springboard to launch privilege escalation attacks.
The flaws, discovered by Mandiant on February 28, 2023, have been assigned the identifiers CVE-2023-26077 and CVE-2023-26078, with the issues remediated in versions 1.8.3.7 and 1.8.4.9 released by Atera on April 17, 2023, and
Zimbra has warned of a critical zero-day security flaw in its email software that has come under active exploitation in the wild.
"A security vulnerability in Zimbra Collaboration Suite Version 8.8.15 that could potentially impact the confidentiality and integrity of your data has surfaced," the company said in an advisory.
It also said that the issue has been addressed and that it's expected to
Microsoft on Tuesday released updates to address a total of 132 new security flaws spanning its software, including six zero-day flaws that it said have been actively exploited in the wild.
Of the 132 vulnerabilities, nine are rated Critical, 122 are rated Important in severity, and one has been assigned a severity rating of "None." This is in addition to eight flaws the tech giant patched in
The U.S. Cybersecurity and Infrastructure Security Agency has added a batch of six flaws to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation.
This comprises three vulnerabilities that Apple patched this week (CVE-2023-32434, CVE-2023-32435, and CVE-2023-32439), two flaws in VMware (CVE-2023-20867 and CVE-2023-20887), and one shortcoming impacting Zyxel
The Chinese state-sponsored group known as UNC3886 has been found to exploit a zero-day flaw in VMware ESXi hosts to backdoor Windows and Linux systems.
The VMware Tools authentication bypass vulnerability, tracked as CVE-2023-20867 (CVSS score: 3.9), "enabled the execution of privileged commands across Windows, Linux, and PhotonOS (vCenter) guest VMs without authentication of guest credentials
Microsoft has rolled out fixes for its Windows operating system and other software components to remediate major security shortcomings as part of Patch Tuesday updates for June 2023.
Of the 73 flaws, six are rated Critical, 63 are rated Important, two are rated Moderate, and one is rated Low in severity. This also includes three issues the tech giant addressed in its Chromium-based Edge browser.
Details have emerged about a now-patched actively exploited security flaw in Microsoft Windows that could be abused by a threat actor to gain elevated privileges on affected systems.
The vulnerability, tracked as CVE-2023-29336, is rated 7.8 for severity and concerns an elevation of privilege bug in the Win32k component.
"An attacker who successfully exploited this vulnerability could gain
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) and Federal Bureau of Investigation (FBI) have published a joint advisory regarding the active exploitation of a recently disclosed critical flaw in Progress Software's MOVEit Transfer application to drop ransomware.
"The Cl0p Ransomware Gang, also known as TA505, reportedly began exploiting a previously unknown SQL injection
Google on Monday released security updates to patch a high-severity flaw in its Chrome web browser that it said is being actively exploited in the wild.
Tracked as CVE-2023-3079, the vulnerability has been described as a type confusion bug in the V8 JavaScript engine. Clement Lecigne of Google's Threat Analysis Group (TAG) has been credited with reporting the issue on June 1, 2023.
"Type
A critical flaw in Progress Software's in MOVEit Transfer managed file transfer application has come under widespread exploitation in the wild to take over vulnerable systems.
The shortcoming, which is assigned the CVE identifier CVE-2023-34362, relates to a severe SQL injection vulnerability that could lead to escalated privileges and potential unauthorized access to the environment.
"An SQL
Multiple security flaws uncovered in Sonos One wireless speakers could be potentially exploited to achieve information disclosure and remote code execution, the Zero Day Initiative (ZDI) said in a report published last week.
The vulnerabilities were demonstrated by three different teams from Qrious Secure, STAR Labs, and DEVCORE at the Pwn2Own hacking contest held in Toronto late last year,
Apple on Thursday rolled out security updates to iOS, iPadOS, macOS, tvOS, watchOS, and the Safari web browser to address dozens of flaws, including three new zero-days that it said are being actively exploited in the wild.
The three security shortcomings are listed below -
CVE-2023-32409 - A WebKit flaw that could be exploited by a malicious actor to break out of the Web Content sandbox. It
Microsoft has rolled out Patch Tuesday updates for May 2023 to address 38 security flaws, including two zero-day bugs that it said is being actively exploited in the wild.
Trend Micro's Zero Day Initiative (ZDI) said the volume is the lowest since August 2021, although it pointed out that "this number is expected to rise in the coming months."
Of the 38 vulnerabilities, six are rated Critical
Cybersecurity researchers have found a way to exploit a recently disclosed critical flaw in PaperCut servers in a manner that bypasses all current detections.
Tracked as CVE-2023-27350 (CVSS score: 9.8), the issue affects PaperCut MF and NG installations that could be exploited by an unauthenticated attacker to execute arbitrary code with SYSTEM privileges.
While the flaw was patched by the
Print management software provider PaperCut said that it has "evidence to suggest that unpatched servers are being exploited in the wild," citing two vulnerability reports from cybersecurity company Trend Micro.
"PaperCut has conducted analysis on all customer reports, and the earliest signature of suspicious activity on a customer server potentially linked to this vulnerability is 14th April 01
Israeli spyware maker NSO Group deployed at least three novel "zero-click" exploits against iPhones in 2022 to infiltrate defenses erected by Apple and deploy Pegasus, according to the latest findings from Citizen Lab.
"NSO Group customers widely deployed at least three iOS 15 and iOS 16 zero-click exploit chains against civil society targets around the world," the interdisciplinary laboratory
Google on Tuesday rolled out emergency fixes to address another actively exploited high-severity zero-day flaw in its Chrome web browser.
The flaw, tracked as CVE-2023-2136, is described as a case of integer overflow in Skia, an open source 2D graphics library. Clément Lecigne of Google's Threat Analysis Group (TAG) has been credited with discovering and reporting the flaw on April 12, 2023.
"
Google on Friday released out-of-band updates to resolve an actively exploited zero-day flaw in its Chrome web browser, making it the first such bug to be addressed since the start of the year.
Tracked as CVE-2023-2033, the high-severity vulnerability has been described as a type confusion issue in the V8 JavaScript engine. Clement Lecigne of Google's Threat Analysis Group (TAG) has been
Apple on Friday released security updates for iOS, iPadOS, macOS, and Safari web browser to address a pair of zero-day flaws that are being exploited in the wild.
The two vulnerabilities are as follows -
CVE-2023-28205 - A use after free issue in WebKit that could lead to arbitrary code execution when processing specially crafted web content.
CVE-2023-28206 - An out-of-bounds write issue in
A number of zero-day vulnerabilities that were addressed last year were exploited by commercial spyware vendors to target Android and iOS devices, Google's Threat Analysis Group (TAG) has revealed.
The two distinct campaigns were both limited and highly targeted, taking advantage of the patch gap between the release of a fix and when it was actually deployed on the targeted devices. The scale of
As many as 55 zero-day vulnerabilities were exploited in the wild in 2022, with most of the flaws discovered in software from Microsoft, Google, and Apple.
While this figure represents a decrease from the year before, when a staggering 81 zero-days were weaponized, it still represents a significant uptick in recent years of threat actors leveraging unknown security flaws to their advantage.
The
Microsoft's Patch Tuesday update for March 2023 is rolling out with remediations for a set of 80 security flaws, two of which have come under active exploitation in the wild.
Eight of the 80 bugs are rated Critical, 71 are rated Important, and one is rated Moderate in severity. The updates are in addition to 29 flaws the tech giant fixed in its Chromium-based Edge browser in recent weeks.
The
Government entities and large organizations have been targeted by an unknown threat actor by exploiting a security flaw in Fortinet FortiOS software to result in data loss and OS and file corruption.
"The complexity of the exploit suggests an advanced actor and that it is highly targeted at governmental or government-related targets," Fortinet researchers Guillaume Lovet and Alex Kong said in an
Microsoft on Tuesday released security updates to address 75 flaws spanning its product portfolio, three of which have come under active exploitation in the wild.
The updates are in addition to 22 flaws the Windows maker patched in its Chromium-based Edge browser over the past month.
Of the 75 vulnerabilities, nine are rated Critical and 66 are rated Important in severity. 37 out of 75 bugs are
Apple on Monday rolled out security updates for iOS, iPadOS, macOS, and Safari to address a zero-day flaw that it said has been actively exploited in the wild.
Tracked as CVE-2023-23529, the issue relates to a type confusion bug in the WebKit browser engine that could be activated when processing maliciously crafted web content, culminating in arbitrary code execution.
The iPhone maker said the
An unknown threat actor created malicious game modes for the Dota 2 multiplayer online battle arena (MOBA) video game that could have been exploited to establish backdoor access to players' systems.
The modes exploited a high-severity flaw in the V8 JavaScript engine tracked as CVE-2021-38003 (CVSS score: 8.8), which was exploited as a zero-day and addressed by Google in October 2021.
"Since V8
A zero-day vulnerability affecting Fortra's GoAnywhere MFT managed file transfer application is being actively exploited in the wild.
Details of the flaw were first publicly shared by security reporter Brian Krebs on Mastodon. No public advisory has been published by Fortra.
The vulnerability is a case of remote code injection that requires access to the administrative console of the application
The first Patch Tuesday fixes shipped by Microsoft for 2023 have addressed a total of 98 security flaws, including one bug that the company said is being actively exploited in the wild.
11 of the 98 issues are rated Critical and 87 are rated Important in severity, with one of the vulnerabilities also listed as publicly known at the time of release. Separately, the Windows maker is expected to
Tech giant Microsoft released its last set of monthly security updates for 2022 with fixes for 49 vulnerabilities across its software products.
Of the 49 bugs, six are rated Critical, 40 are rated Important, and three are rated Moderate in severity. The updates are in addition to 24 vulnerabilities that have been addressed in the Chromium-based Edge browser since the start of the month.
The U.S. National Security Agency (NSA) on Tuesday said a threat actor tracked as APT5 has been actively exploiting a zero-day flaw in Citrix Application Delivery Controller (ADC) and Gateway to take over affected systems.
The critical remote code execution vulnerability, identified as CVE-2022-27518, could allow an unauthenticated attacker to execute commands remotely on vulnerable devices and
An Internet Explorer zero-day vulnerability was actively exploited by a North Korean threat actor to target South Korean users by capitalizing on the recent Itaewon Halloween crowd crush to trick users into downloading malware.
The discovery, reported by Google Threat Analysis Group researchers Benoît Sevens and Clément Lecigne, is the latest set of attacks perpetrated by ScarCruft, which is
Search giant Google on Friday released an out-of-band security update to fix a new actively exploited zero-day flaw in its Chrome web browser.
The high-severity flaw, tracked as CVE-2022-4262, concerns a type confusion bug in the V8 JavaScript engine. Clement Lecigne of Google's Threat Analysis Group (TAG) has been credited with reporting the issue on November 29, 2022.
Type confusion
A Barcelona-based surveillanceware vendor named Variston IT is said to have surreptitiously planted spyware on targeted devices by exploiting several zero-day flaws in Google Chrome, Mozilla Firefox, and Windows, some of which date back to December 2018.
"Their Heliconia framework exploits n-day vulnerabilities in Chrome, Firefox, and Microsoft Defender, and provides all the tools necessary to
Delivering a superior customer experience is essential for any e-commerce business. For those companies, there's a lot at stake this holiday season. According to Digital Commerce 360, nearly $1.00 of every $4.00 spent on retail purchases during the 2022 holiday season will be spent online, resulting in $224 billion in e-commerce sales. To ensure your e-commerce site is ready for the holiday rush
Microsoft's latest round of monthly security updates has been released with fixes for 68 vulnerabilities spanning its software portfolio, including patches for six actively exploited zero-days.
12 of the issues are rated Critical, two are rated High, and 55 are rated Important in severity. This also includes the weaknesses that were closed out by OpenSSL the previous week.
Also separately
Microsoft is warning of an uptick among nation-state and criminal actors increasingly leveraging publicly-disclosed zero-day vulnerabilities for breaching target environments.
The tech giant, in its 114-page Digital Defense Report, said it has "observed a reduction in the time between the announcement of a vulnerability and the commoditization of that vulnerability," making it imperative that
Google on Thursday rolled out emergency fixes to contain an actively exploited zero-day flaw in its Chrome web browser.
The vulnerability, tracked as CVE-2022-3723, has been described as a type confusion flaw in the V8 JavaScript engine.
Security researchers Jan Vojtěšek, Milánek, and Przemek Gmerek of Avast have been credited with reporting the flaw on October 25, 2022.
"Google is aware of
Tech giant Apple on Monday rolled out updates to remediate a zero-day flaw in iOS and iPadOS that it said has been actively exploited in the wild.
The weakness, given the identifier CVE-2022-42827, has been described as an out-of-bounds write issue in the Kernel, which could be abused by a rogue application to execute arbitrary code with the highest privileges.
Successful exploitation of
Details have emerged about a now-patched security flaw in Windows Common Log File System (CLFS) that could be exploited by an attacker to gain elevated permissions on compromised machines.
Tracked as CVE-2022-37969 (CVSS score: 7.8), the issue was addressed by Microsoft as part of its Patch Tuesday updates for September 2022, while also noting that it was being actively exploited in the wild.
"
Microsoft's Patch Tuesday update for the month of October has addressed a total of 85 security vulnerabilities, including fixes for an actively exploited zero-day flaw in the wild.
Of the 85 bugs, 15 are rated Critical, 69 are rated Important, and one is rated Moderate in severity. The update, however, does not include mitigations for the actively exploited ProxyNotShell flaws in Exchange Server
Microsoft on Friday disclosed that a single activity group in August 2022 achieved initial access and breached Exchange servers by chaining the two newly disclosed zero-day flaws in a limited set of attacks aimed at less than 10 organizations globally.
"These attacks installed the Chopper web shell to facilitate hands-on-keyboard access, which the attackers used to perform Active Directory
By Ravie Lakshmanan — September 30th 2022 at 04:25
Security researchers are warning of previously undisclosed flaws in fully patched Microsoft Exchange servers being exploited by malicious actors in real-world attacks to achieve remote code execution on affected systems.
The advisory comes from Vietnamese cybersecurity company GTSC, which discovered the shortcomings as part of its security monitoring and incident response efforts in August 2022.
By Ravie Lakshmanan — September 14th 2022 at 04:42
Tech giant Microsoft on Tuesday shipped fixes to quash 64 new security flaws across its software lineup, including one zero-day flaw that has been actively exploited in real-world attacks.
Of the 64 bugs, five are rated Critical, 57 are rated Important, one is rated Moderate, and one is rated Low in severity. The patches are in addition to 16 vulnerabilities that Microsoft addressed in its
By Ravie Lakshmanan — September 14th 2022 at 01:51
A zero-day flaw in the latest version of a WordPress premium plugin known as WPGateway is being actively exploited in the wild, potentially allowing malicious actors to completely take over affected sites.
Tracked as CVE-2022-3180 (CVSS score: 9.8), the issue is being weaponized to add a malicious administrator user to sites running the WPGateway plugin, WordPress security company Wordfence
By Ravie Lakshmanan — September 13th 2022 at 03:36
Apple has released another round of security updates to address multiple vulnerabilities in iOS and macOS, including a new zero-day flaw that has been used in attacks in the wild.
The issue, assigned the identifier CVE-2022-32917, is rooted in the Kernel component and could enable a malicious app to execute arbitrary code with kernel privileges.
"Apple is aware of a report that this issue may
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