Synopsis
The remote Debian host is missing one or more security-related updates.
Description
The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3340 advisory.
- An issue was discovered in libgit2 before 0.28.4 and 0.9x before 0.99.0. path.c mishandles equivalent filenames that exist because of NTFS Alternate Data Streams. This may allow remote code execution when cloning a repository. This issue is similar to CVE-2019-1352. (CVE-2020-12278)
- An issue was discovered in libgit2 before 0.28.4 and 0.9x before 0.99.0. checkout.c mishandles equivalent filenames that exist because of NTFS short names. This may allow remote code execution when cloning a repository. This issue is similar to CVE-2019-1353. (CVE-2020-12279)
- libgit2 is a cross-platform, linkable library implementation of Git. When using an SSH remote with the optional libssh2 backend, libgit2 does not perform certificate checking by default. Prior versions of libgit2 require the caller to set the `certificate_check` field of libgit2's `git_remote_callbacks` structure - if a certificate check callback is not set, libgit2 does not perform any certificate checking.
This means that by default - without configuring a certificate check callback, clients will not perform validation on the server SSH keys and may be subject to a man-in-the-middle attack. Users are encouraged to upgrade to v1.4.5 or v1.5.1. Users unable to upgrade should ensure that all relevant certificates are manually checked. (CVE-2023-22742)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Upgrade the libgit2 packages.
For Debian 10 buster, these problems have been fixed in version 0.27.7+dfsg.1-0.2+deb10u1.
Plugin Details
File Name: debian_DLA-3340.nasl
Agent: unix
Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus
Risk Information
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
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: cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:libgit2-27, p-cpe:/a:debian:debian_linux:libgit2-dev
Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l
Exploit Ease: No known exploits are available
Patch Publication Date: 2/23/2023
Vulnerability Publication Date: 4/27/2020