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GHSA-cgx6-hpwq-fhv5
No affected components available
Summary
Nokogiri v1.13.5 upgrades the packaged version of its dependency libxml2 from v2.9.13 to v2.9.14.
libxml2 v2.9.14 addresses CVE-2022-29824. This version also includes several security-related bug fixes for which CVEs were not created, including a potential double-free, potential memory leaks, and integer-overflow.
Please note that this advisory only applies to the CRuby implementation of Nokogiri < 1.13.5, and only if the packaged libraries are being used. If you've overridden defaults at installation time to use system libraries instead of packaged libraries, you should instead pay attention to your distro's libxml2 and libxslt release announcements.
Mitigation
Upgrade to Nokogiri >= 1.13.5.
Users who are unable to upgrade Nokogiri may also choose a more complicated mitigation: compile and link Nokogiri against external libraries libxml2 >= 2.9.14 which will also address these same issues.
Impact
libxml2 CVE-2022-29824
- CVSS3 score:
- Unspecified upstream
- Nokogiri maintainers evaluate at 8.6 (High) (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H). Note that this is different from the CVSS assessed by NVD.
- Type: Denial of service, information disclosure
- Description: In libxml2 before 2.9.14, several buffer handling functions in buf.c (xmlBuf*) and tree.c (xmlBuffer*) don't check for integer overflows. This can result in out-of-bounds memory writes. Exploitation requires a victim to open a crafted, multi-gigabyte XML file. Other software using libxml2's buffer functions, for example libxslt through 1.1.35, is affected as well.
- Fixed: https://gitlab.gnome.org/GNOME/libxml2/-/commit/2554a24
All versions of libml2 prior to v2.9.14 are affected.
Applications parsing or serializing multi-gigabyte documents (in excess of INT_MAX bytes) may be vulnerable to an integer overflow bug in buffer handling that could lead to exposure of confidential data, modification of unrelated data, or a segmentation fault resulting in a denial-of-service.
References
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a low impact on the confidentiality of the information. There is a low impact on the integrity of the data. There is a high impact on the availability of the system.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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