Integer Overflow or Wraparound Affecting yajl-debuginfo package, versions <0:2.0.4-4.amzn2.0.2


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
2.18% (90th percentile)

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  • Snyk IDSNYK-AMZN2-YAJLDEBUGINFO-5740439
  • published27 Jun 2023
  • disclosed5 Apr 2022

Introduced: 5 Apr 2022

CVE-2022-24795  (opens in a new tab)
CWE-190  (opens in a new tab)
CWE-119  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 yajl-debuginfo to version 0:2.0.4-4.amzn2.0.2 or higher.
This issue was patched in ALAS2-2023-2101.

NVD Description

Note: Versions mentioned in the description apply only to the upstream yajl-debuginfo package and not the yajl-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

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 Scores

version 3.1