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Medium ALAS2-2023-2101 1 CVE

Moderate: yajl security update (Amazon Linux 2)

Published Jun 21, 2023 · Updated Jun 29, 2023

Summary

Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2022-24795: 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.

Fixed packages 3

ReleasePackageFixed in
Amazon Linux · 2 yajl 0:2.0.4-4.amzn2.0.2
Amazon Linux · 2 yajl-debuginfo 0:2.0.4-4.amzn2.0.2
Amazon Linux · 2 yajl-devel 0:2.0.4-4.amzn2.0.2

Vulnerabilities 1

  • Medium 5.9

    Buffer Overflow and Integer Overflow in yajl-ruby

    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…

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2022-24795.html