Amazon Linux 2 : git (ALAS-2023-1984)

high Nessus Plugin ID 172162

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of git installed on the remote host is prior to 2.39.2-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2023-1984 advisory.

- Git is a revision control system. Using a specially-crafted repository, Git prior to versions 2.39.2, 2.38.4, 2.37.6, 2.36.5, 2.35.7, 2.34.7, 2.33.7, 2.32.6, 2.31.7, and 2.30.8 can be tricked into using its local clone optimization even when using a non-local transport. Though Git will abort local clones whose source `$GIT_DIR/objects` directory contains symbolic links, the `objects` directory itself may still be a symbolic link. These two may be combined to include arbitrary files based on known paths on the victim's filesystem within the malicious repository's working copy, allowing for data exfiltration in a similar manner as CVE-2022-39253. A fix has been prepared and will appear in v2.39.2 v2.38.4 v2.37.6 v2.36.5 v2.35.7 v2.34.7 v2.33.7 v2.32.6, v2.31.7 and v2.30.8. If upgrading is impractical, two short-term workarounds are available. Avoid cloning repositories from untrusted sources with `--recurse-submodules`.
Instead, consider cloning repositories without recursively cloning their submodules, and instead run `git submodule update` at each layer. Before doing so, inspect each new `.gitmodules` file to ensure that it does not contain suspicious module URLs. (CVE-2023-22490)

- Git, a revision control system, is vulnerable to path traversal prior to versions 2.39.2, 2.38.4, 2.37.6, 2.36.5, 2.35.7, 2.34.7, 2.33.7, 2.32.6, 2.31.7, and 2.30.8. By feeding a crafted input to `git apply`, a path outside the working tree can be overwritten as the user who is running `git apply`. A fix has been prepared and will appear in v2.39.2, v2.38.4, v2.37.6, v2.36.5, v2.35.7, v2.34.7, v2.33.7, v2.32.6, v2.31.7, and v2.30.8. As a workaround, use `git apply --stat` to inspect a patch before applying; avoid applying one that creates a symbolic link and then creates a file beyond the symbolic link.
(CVE-2023-23946)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Run 'yum update git' to update your system.

Plugin Details

Severity: High

ID: 172162

File Name: al2_ALAS-2023-1984.nasl

Version: 1.1

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 3/7/2023

Updated: 9/11/2023

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:N

CVSS Score Source: CVE-2023-23946

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:H/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:git-subtree, p-cpe:/a:amazon:linux:git-svn, p-cpe:/a:amazon:linux:gitweb, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:gitk, p-cpe:/a:amazon:linux:git-instaweb, p-cpe:/a:amazon:linux:git-credential-libsecret, p-cpe:/a:amazon:linux:git-daemon, p-cpe:/a:amazon:linux:git-all, p-cpe:/a:amazon:linux:git-debuginfo, p-cpe:/a:amazon:linux:git-p4, p-cpe:/a:amazon:linux:git-core-doc, p-cpe:/a:amazon:linux:perl-git, p-cpe:/a:amazon:linux:git-cvs, p-cpe:/a:amazon:linux:git-core, p-cpe:/a:amazon:linux:git-email, p-cpe:/a:amazon:linux:git, p-cpe:/a:amazon:linux:git-gui, p-cpe:/a:amazon:linux:perl-git-svn

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/2/2023

Vulnerability Publication Date: 2/14/2023

Reference Information

CVE: CVE-2023-22490, CVE-2023-23946

Detections

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