Vulnerability Description
yajl-ruby is a C binding to the YAJL JSON parsing and generation library. The 1.x branch and the 2.x branch of `yajl` contain an integer overflow which leads to subsequent heap memory corruption when dealing with large (~2GB) inputs. The reallocation logic at `yajl_buf.c#L64` may result in the `need` 32bit integer wrapping to 0 when `need` approaches a value of 0x80000000 (i.e. ~2GB of data), which results in a reallocation of buf->alloc into a small heap chunk. These integers are declared as `size_t` in the 2.x branch of `yajl`, which practically prevents the issue from triggering on 64bit platforms, however this does not preclude this issue triggering on 32bit builds on which `size_t` is a 32bit integer. Subsequent population of this under-allocated heap chunk is based on the original buffer size, leading to heap memory corruption. This vulnerability mostly impacts process availability. Maintainers believe exploitation for arbitrary code execution is unlikely. A patch is available and anticipated to be part of yajl-ruby version 1.4.2. As a workaround, avoid passing large inputs to YAJL.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Yajl-Ruby Project | Yajl-Ruby | < 1.4.2 |
Related Weaknesses (CWE)
References
- https://github.com/brianmario/yajl-ruby/blob/7168bd79b888900aa94523301126f968a93ExploitThird Party Advisory
- https://github.com/brianmario/yajl-ruby/commit/7168bd79b888900aa94523301126f968aPatchThird Party Advisory
- https://github.com/brianmario/yajl-ruby/security/advisories/GHSA-jj47-x69x-mxrmExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/07/msg00013.html
- https://lists.debian.org/debian-lts-announce/2023/08/msg00003.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://github.com/brianmario/yajl-ruby/blob/7168bd79b888900aa94523301126f968a93ExploitThird Party Advisory
- https://github.com/brianmario/yajl-ruby/commit/7168bd79b888900aa94523301126f968aPatchThird Party Advisory
- https://github.com/brianmario/yajl-ruby/security/advisories/GHSA-jj47-x69x-mxrmExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/07/msg00013.html
- https://lists.debian.org/debian-lts-announce/2023/08/msg00003.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2022-24795?
CVE-2022-24795 is a vulnerability with a CVSS score of 5.9 (MEDIUM). yajl-ruby is a C binding to the YAJL JSON parsing and generation library. The 1.x branch and the 2.x branch of `yajl` contain an integer overflow which leads to subsequent heap memory corruption when ...
How severe is CVE-2022-24795?
CVE-2022-24795 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-24795?
Check the references section above for vendor advisories and patch information. Affected products include: Yajl-Ruby Project Yajl-Ruby.