Amazon Linux 2 : rust, --advisory ALAS2-2026-3246 (ALAS-2026-3246)

medium Nessus Plugin ID 306296

Synopsis

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

Description

The version of rust installed on the remote host is prior to 1.94.0-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3246 advisory.

A flaw in the gix-date library can generate invalid non-UTF8 strings, leading to undefined behavior when processed. The most likely impact from a successful attack is to data integrity, by the malicious data being able to corrupt data being hold in memory and to system availability as it eventually may lead to the software using the gix_date library to crash. (CVE-2026-0810)

tar-rs is a tar archive reading/writing library for Rust. Versions 0.4.44 and below have conditional logic that skips the PAX size header in cases where the base header size is nonzero. As part of CVE-2025-62518, the astral-tokio-tar project was changed to correctly honor PAX size headers in the case where it was different from the base header. This is almost the inverse of the astral-tokio-tar issue. Any discrepancy in how tar parsers honor file size can be used to create archives that appear differently when unpacked by different archivers. In this case, the tar-rs (Rust tar) crate is an outlier in checking for the header size - other tar parsers (including e.g. Go archive/tar) unconditionally use the PAX size override. This can affect anything that uses the tar crate to parse archives and expects to have a consistent view with other parsers. This issue has been fixed in version 0.4.45. (CVE-2026-33055)

tar-rs is a tar archive reading/writing library for Rust. In versions 0.4.44 and below, when unpacking a tar archive, the tar crate's unpack_dir function uses fs::metadata() to check whether a path that already exists is a directory. Because fs::metadata() follows symbolic links, a crafted tarball containing a symlink entry followed by a directory entry with the same name causes the crate to treat the symlink target as a valid existing directory -- and subsequently apply chmod to it. This allows an attacker to modify the permissions of arbitrary directories outside the extraction root. This issue has been fixed in version 0.4.45. (CVE-2026-33056)

Tenable has extracted the preceding description block directly from the tested product 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

Run 'yum update rust' or or 'yum update --advisory ALAS2-2026-3246' to update your system.

Plugin Details

Severity: Medium

ID: 306296

File Name: al2_ALAS-2026-3246.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 4/14/2026

Updated: 4/14/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-33055

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

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

CVSS v4

Risk Factor: Medium

Base Score: 5.1

Threat Score: 2

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-33056

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:rust, p-cpe:/a:amazon:linux:rust-debugger-common, p-cpe:/a:amazon:linux:rust-doc, p-cpe:/a:amazon:linux:rustfmt, p-cpe:/a:amazon:linux:rust-toolset, p-cpe:/a:amazon:linux:cargo, p-cpe:/a:amazon:linux:clippy, p-cpe:/a:amazon:linux:rust-gdb, p-cpe:/a:amazon:linux:rust-src, p-cpe:/a:amazon:linux:rust-std-static, p-cpe:/a:amazon:linux:rust-analyzer, p-cpe:/a:amazon:linux:rust-toolset-srpm-macros

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: 4/14/2026

Vulnerability Publication Date: 1/5/2026

Reference Information

CVE: CVE-2026-0810, CVE-2026-33055, CVE-2026-33056

Detections

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