CVE-2022-24795 (High) detected in yajl-ruby-1.4.1.gem

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CVE-2022-24795 - High Severity Vulnerability

Vulnerable Library - yajl-ruby-1.4.1.gem

Library home page: https://rubygems.org/gems/yajl-ruby-1.4.1.gem

Dependency Hierarchy:

• foodcritic-4.0.0.gem (Root Library)
  • ❌ yajl-ruby-1.4.1.gem (Vulnerable Library)

Found in base branch: master

Vulnerability Details

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.

Publish Date: 2022-04-05

URL: CVE-2022-24795

CVSS 3 Score Details (7.5)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-jj47-x69x-mxrm

Release Date: 2022-04-05

Fix Resolution: yajl-ruby - 1.4.2