Detections
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AlmaLinux 8 : yajl (ALSA-2022:7524)
high Nessus Plugin ID 167315
Synopsis
The remote AlmaLinux host is missing a security update.Description
The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2022:7524 advisory.- 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. (CVE-2022-24795)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the affected yajl and / or yajl-devel packages.See Also
Plugin Details
Severity: High
ID: 167315
File Name: alma_linux_ALSA-2022-7524.nasl
Version: 1.3
Type: local
Family: Alma Linux Local Security Checks
Published: 11/12/2022
Updated: 10/4/2023
Supported Sensors: Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.9
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N
CVSS Score Source: CVE-2022-24795
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:alma:linux:8::appstream, p-cpe:/a:alma:linux:yajl-devel, cpe:/o:alma:linux:8::powertools, p-cpe:/a:alma:linux:yajl, cpe:/o:alma:linux:8
Required KB Items: Host/local_checks_enabled, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list, Host/cpu
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 11/8/2022
Vulnerability Publication Date: 4/5/2022
Reference Information
CVE: CVE-2022-24795