Headline
Update Chrome now! Google patches critical vulnerability being exploited in the wild
Categories: Exploits and vulnerabilities Categories: News Tags: Google
Tags: Chrome
Tags: CVE-2023-4863
Tags: WebP
Tags: buffer overflow
Tags: 116.0.5845.187/.188
Chrome users are being urged to patch a critical vulnerability for which an exploit is available.
(Read more…)
The post Update Chrome now! Google patches critical vulnerability being exploited in the wild appeared first on Malwarebytes Labs.
Google has released an update for Chrome Desktop which includes one critical security fix. There is an active exploit for the patched vulnerability, according to Google, which means cybercriminals are aware of the vulnerability and are using it.
If you’re a Chrome user on Windows, Mac, or Linux, you should update as soon as possible.
The easiest way to update Chrome is to allow it to update automatically, which basically uses the same method as outlined below but does not require your attention. But you can end up lagging behind if you never close the browser or if something goes wrong—such as an extension stopping you from updating the browser.
So, it doesn’t hurt to check now and then. And now would be a good time, given the severity of the vulnerabilities in this batch. My preferred method is to have Chrome open the page chrome://settings/help which you can also find by clicking Settings > About Chrome.
If there is an update available, Chrome will notify you and start downloading it. Then all you have to do is relaunch the browser in order for the update to complete.
After the update, the version should be 116.0.5845.187 for Mac and Linux, and 116.0.5845.187/.188 for Windows, or later.
The vulnerability
Google never gives out a lot of information about vulnerabilities, for obvious reasons. Access to bug details and links may be kept restricted until a majority of users are updated with a fix. However, from the update page we can learn a few things.
The Common Vulnerabilities and Exposures (CVE) database lists publicly disclosed computer security flaws. The zero-day patched in this update is listed as:
CVE-2023-4863: a heap buffer overflow in WebP, also described as a vulnerability that resides in the WebP image format which could lead to arbitrary code execution or a crash.
A buffer overflow is a type of software vulnerability that exists when an area of memory within a software application reaches its address boundary and writes into an adjacent memory region. In software exploit code, two common areas that are targeted for overflows are the stack and the heap.
The heap is an area of memory made available use by the program. The program can request blocks of memory for its use within the heap. In order to allocate a block of some size, the program makes an explicit request by calling the heap allocation operation.
Credit for reporting the vulnerability was given to Apple Security Engineering and Architecture (SEAR) and The Citizen Lab at The University of Torontoʼs Munk School on 2023-09-06. The fact that this happens to coincide with a report by CitizenLab about two Apple vulnerabilities that used by the NSO group to drop the Pegasus spyware, seems too much to be a coincidence.
Add the fact that both Apple CVE-2023-41064 and Chrome CVE-2023-4863 are based on image processing and we feel comfortable saying that these two vulnerabilities are very, very likely to be related.
We don’t just report on threats—we remove them
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Google has assigned a new CVE identifier for a critical security flaw in the libwebp image library for rendering images in the WebP format that has come under active exploitation in the wild. Tracked as CVE-2023-5129, the issue has been given the maximum severity score of 10.0 on the CVSS rating system. It has been described as an issue rooted in the Huffman coding algorithm - With a specially
Red Hat Security Advisory 2023-5309-01 - The libwebp packages provide a library and tools for the WebP graphics format. WebP is an image format with a lossy compression of digital photographic images. WebP consists of a codec based on the VP8 format, and a container based on the Resource Interchange File Format. Webmasters, web developers and browser developers can use WebP to compress, archive, and distribute digital images more efficiently. Issues addressed include a buffer overflow vulnerability.
Red Hat Security Advisory 2023-5214-01 - The libwebp packages provide a library and tools for the WebP graphics format. WebP is an image format with a lossy compression of digital photographic images. WebP consists of a codec based on the VP8 format, and a container based on the Resource Interchange File Format. Webmasters, web developers and browser developers can use WebP to compress, archive, and distribute digital images more efficiently. Issues addressed include a buffer overflow vulnerability.
Red Hat Security Advisory 2023-5222-01 - The libwebp packages provide a library and tools for the WebP graphics format. WebP is an image format with a lossy compression of digital photographic images. WebP consists of a codec based on the VP8 format, and a container based on the Resource Interchange File Format. Webmasters, web developers and browser developers can use WebP to compress, archive, and distribute digital images more efficiently. Issues addressed include a buffer overflow vulnerability.
An update for thunderbird is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2023-4863: A heap-based buffer flaw was found in the way libwebp, a library used to process "WebP" image format data, processes certain specially formatted WebP images. An attacker could use this flaw to crash or execute remotely arbitrary code in an application such as a web browser compiled with this library.
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Debian Linux Security Advisory 5498-1 - A buffer overflow in parsing WebP images may result in the execution of arbitrary code.
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Apple Security Advisory 2023-09-11-3 - macOS Big Sur 11.7.10 addresses buffer overflow and code execution vulnerabilities.
Apple Security Advisory 2023-09-11-2 - macOS Monterey 12.6.9 addresses buffer overflow and code execution vulnerabilities.
Apple Security Advisory 2023-09-11-1 - iOS 15.7.9 and iPadOS 15.7.9 addresses buffer overflow and code execution vulnerabilities.
Ubuntu Security Notice 6369-1 - It was discovered that libwebp incorrectly handled certain malformed images. If a user or automated system were tricked into opening a specially crafted image file, a remote attacker could use this issue to cause libwebp to crash, resulting in a denial of service, or possibly execute arbitrary code.
Ubuntu Security Notice 6368-1 - Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, bypass security restrictions, cross-site tracing, or execute arbitrary code. It was discovered that Thunderbird did not properly manage memory when handling WebP images. If a user were tricked into opening a malicious WebP image file, an attacker could potentially exploit these to cause a denial of service or execute arbitrary code.
Debian Linux Security Advisory 5497-1 - A buffer overflow in parsing WebP images may result in the execution of arbitrary code.
Ubuntu Security Notice 6367-1 - It was discovered that Firefox did not properly manage memory when handling WebP images. If a user were tricked into opening a webpage containing malicious WebP image file, an attacker could potentially exploit these to cause a denial of service or execute arbitrary code.
Debian Linux Security Advisory 5496-1 - A buffer overflow in parsing WebP images may result in the execution of arbitrary code.
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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
Microsoft today issued software updates to fix at least five dozen security holes in Windows and supported software, including patches for two zero-day vulnerabilities that are already being exploited. Also, Adobe, Google Chrome and Apple iOS users may have their own zero-day patching to do.
Heap buffer overflow in WebP in Google Chrome prior to 116.0.5845.187 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: Critical)
Heap buffer overflow in WebP in Google Chrome prior to 116.0.5845.187 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: Critical)
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Categories: Exploits and vulnerabilities Categories: News Tags: Blastpass Tags: citizenlab Tags: pegasus Tags: nso Tags: cisa Tags: apple Tags: cve-2023-41064 Tags: cve-2023-41061 Tags: buffer overflow CISA has added two recently discovered Apple vulnerabilities to its catalog of known exploited vulnerabilities. (Read more...) The post Two Apple issues added by CISA to its catalog of known exploited vulnerabilities appeared first on Malwarebytes Labs.
Apple Security Advisory 2023-09-07-2 - iOS 16.6.1 and iPadOS 16.6.1 addresses buffer overflow and code execution vulnerabilities.
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A buffer overflow issue was addressed with improved memory handling. This issue is fixed in macOS Ventura 13.5.2, iOS 16.6.1 and iPadOS 16.6.1. Processing a maliciously crafted image may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.