libxml2 up to 2.10.2 XML Document memory corruption

Summaryinfo

A vulnerability, which was classified as critical, has been found in libxml2 up to 2.10.2. This issue affects some unknown processing of the component XML Document Handler. The manipulation leads to memory corruption. This vulnerability is traded as CVE-2022-40303. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in libxml2 up to 2.10.2 (Document Processing Software). This issue affects an unknown functionality of the component XML Document Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in libxml2 before 2.10.3. When parsing a multi-gigabyte XML document with the XML_PARSE_HUGE parser option enabled, several integer counters can overflow. This results in an attempt to access an array at a negative 2GB offset, typically leading to a segmentation fault.

The weakness was shared 11/23/2022 as c846986356fc149915a74972bf198abc266bc2c0. The advisory is shared at gitlab.gnome.org. The identification of this vulnerability is CVE-2022-40303 since 09/09/2022. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 211168 (Fedora 37 : libxml2 / xmlsec1 (2022-a6812b0224)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.10.3 eliminates this vulnerability. The upgrade is hosted for download at gitlab.gnome.org. Applying the patch c846986356fc149915a74972bf198abc266bc2c0 is able to eliminate this problem. The bugfix is ready for download at gitlab.gnome.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (211168). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Document Processing Software

Name

• libxml2

Version

• 2.10.0
• 2.10.1
• 2.10.2

License

• open-source

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CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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