Detections
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Alibaba Cloud Linux 3 : 0020: git (ALINUX3-SA-2023:0020)
critical Nessus Plugin ID 236669
Synopsis
The remote Alibaba Cloud Linux host is missing one or more security updates.Description
The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2023:0020 advisory.Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:
CVE-2022-23521:
Git is distributed revision control system. gitattributes are a mechanism to allow defining attributes for paths. These attributes can be defined by adding a `.gitattributes` file to the repository, which contains a set of file patterns and the attributes that should be set for paths matching this pattern. When parsing gitattributes, multiple integer overflows can occur when there is a huge number of path patterns, a huge number of attributes for a single pattern, or when the declared attribute names are huge. These overflows can be triggered via a crafted `.gitattributes` file that may be part of the commit history. Git silently splits lines longer than 2KB when parsing gitattributes from a file, but not when parsing them from the index. Consequentially, the failure mode depends on whether the file exists in the working tree, the index or both. This integer overflow can result in arbitrary heap reads and writes, which may result in remote code execution. The problem has been patched in the versions published on 2023-01-17, going back to v2.30.7. Users are advised to upgrade. There are no known workarounds for this issue.
CVE-2022-41903:
Git is distributed revision control system. `git log` can display commits in an arbitrary format using its `--format` specifiers. This functionality is also exposed to `git archive` via the `export-subst` gitattribute. When processing the padding operators, there is a integer overflow in `pretty.c::format_and_pad_commit()` where a `size_t` is stored improperly as an `int`, and then added as an offset to a `memcpy()`. This overflow can be triggered directly by a user running a command which invokes the commit formatting machinery (e.g., `git log --format=...`). It may also be triggered indirectly through git archive via the export-subst mechanism, which expands format specifiers inside of files within the repository during a git archive. This integer overflow can result in arbitrary heap writes, which may result in arbitrary code execution. The problem has been patched in the versions published on 2023-01-17, going back to v2.30.7. Users are advised to upgrade. Users who are unable to upgrade should disable `git archive` in untrusted repositories. If you expose git archive via `git daemon`, disable it by running `git config --global daemon.uploadArch false`.
Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected packages.See Also
http://mirrors.aliyun.com/alinux/3/cve/alinux3-sa-20230020.xml
Plugin Details
Severity: Critical
ID: 236669
File Name: alinux3_sa_2023-0020.nasl
Version: 1.1
Type: local
Published: 5/14/2025
Updated: 5/14/2025
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: Critical
Base Score: 10
Temporal Score: 7.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2022-41903
CVSS v3
Risk Factor: Critical
Base Score: 9.8
Temporal Score: 8.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:git-debugsource, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:git-credential-libsecret, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:git-subtree, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:git-daemon-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:git-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:gitk, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:git-gui, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:gitweb, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:git-core, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:git-core-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:git-all, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:git-email, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:git-daemon, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:git-svn, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:perl-git, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:git-credential-libsecret-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:git, cpe:/o:alibabacloud:alibaba_cloud_linux_3, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:perl-git-svn, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:git-instaweb, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:git-core-doc
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/Alibaba/release, Host/Alibaba/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 2/8/2023
Vulnerability Publication Date: 1/10/2023
Reference Information
CVE: CVE-2022-23521, CVE-2022-41903