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Security Advisories: GSA_kwCzR0hTQS1qajQ3LXg2OXgtbXhybc04iw
Buffer Overflow in yajl-ruby
NOTE: A previous patch, 1.4.2, fixed the heap memory issue, but could still lead to a DoS infinite loop. Please update to version 1.4.3
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.
Details
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.
Impact
We rate this as a moderate severity vulnerability which mostly impacts process availability as we believe exploitation for arbitrary code execution to be unlikely.
Patches
Patched in yajl-ruby 1.4.3
Workarounds
Avoid passing large inputs to YAJL
References
For more information
If you have any questions or comments about this advisory:
- Open an issue in yajl-ruby
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1qajQ3LXg2OXgtbXhybc04iw
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: about 2 years ago
Updated: 9 months ago
CVSS Score: 5.9
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Identifiers: GHSA-jj47-x69x-mxrm, CVE-2022-24795
References:
- https://github.com/brianmario/yajl-ruby/security/advisories/GHSA-jj47-x69x-mxrm
- https://nvd.nist.gov/vuln/detail/CVE-2022-24795
- https://github.com/brianmario/yajl-ruby/commit/7168bd79b888900aa94523301126f968a93eb3a6
- https://github.com/brianmario/yajl-ruby/blob/7168bd79b888900aa94523301126f968a93eb3a6/ext/yajl/yajl_buf.c#L64
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/yajl-ruby/CVE-2022-24795.yml
- https://lists.debian.org/debian-lts-announce/2023/07/msg00013.html
- https://lists.fedoraproject.org/archives/list/[email protected]/message/KLE3C4CECEJ4EUYI56KXI6OWACWXX7WN/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/YO32YDJ74DADC7CMJNLSLBVWN5EXGF5J/
- https://lists.debian.org/debian-lts-announce/2023/08/msg00003.html
- https://github.com/advisories/GHSA-jj47-x69x-mxrm
Blast Radius: 27.5
Affected Packages
rubygems:yajl-ruby
Dependent packages: 928Dependent repositories: 45,564
Downloads: 73,315,310 total
Affected Version Ranges: <= 1.4.2
Fixed in: 1.4.3
All affected versions: 0.5.5, 0.5.6, 0.5.7, 0.5.8, 0.5.9, 0.5.10, 0.5.11, 0.5.12, 0.6.0, 0.6.1, 0.6.2, 0.6.3, 0.6.4, 0.6.5, 0.6.6, 0.6.7, 0.6.8, 0.6.9, 0.7.0, 0.7.1, 0.7.2, 0.7.3, 0.7.4, 0.7.5, 0.7.6, 0.7.7, 0.7.8, 0.7.9, 0.8.0, 0.8.1, 0.8.2, 0.8.3, 1.0.0, 1.1.0, 1.2.0, 1.2.1, 1.2.2, 1.2.3, 1.3.0, 1.3.1, 1.4.0, 1.4.1, 1.4.2
All unaffected versions: 1.4.3