openSUSE 16 Security Update : perl-YAML-Syck (openSUSE-SU-2026:21452-1)

critical Nessus Plugin ID 330582

Synopsis

The remote openSUSE host is missing one or more security updates.

Description

The remote openSUSE 16 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21452-1 advisory.

Changes in perl-YAML-Syck:

- updated to 1.470.0 (1.47) [Security]
- Fix four libsyck memory-safety CVEs reachable from the default YAML::Syck::Load() path on untrusted input with no special flags (reported by Paul Johnson via CPANSec, PR #213):
- CVE-2026-57075 (CWE-125): out-of-bounds read in the base64 decoder caused by signed-char indexing of the decode table on !!binary input bsc#1271632
- CVE-2026-57076 (CWE-416): use-after-free of an anchor key string shared between the node and the anchors table bsc#1271633
- CVE-2026-57077 (CWE-125): one-byte out-of-bounds read in the lexer newline scan during block-scalar parsing (incomplete-fix follow-on to CVE-2025-11683) bsc#1271634
- CVE-2026-13713 (CWE-416/CWE-415): use-after-free / double-free of an anchor node on anchor redefinition, a remote-crash DoS from a 7-byte input bsc#1271631
- Harden syck_base64dec() to bounds-check each read so it cannot run past a non-NUL-terminated input buffer (defense-in-depth for callers passing raw buffers; PR #213) [Bug Fixes]
- Fix: enforce $MaxDepth on Load to prevent C-stack exhaustion from deeply nested YAML/JSON input; YAML::Syck and JSON::Syck Load now default to 512, matching Dump (PR #204)
- Fix: emit YAML canonical forms (.nan, .inf, -.inf) for NaN/Inf values in Dump so they roundtrip with ImplicitTyping instead of reloading as plain strings (PR #201) [Maintenance]
- CI: add an AddressSanitizer job that builds the XS with
-fsanitize=address and runs the suite plus the CVE trigger inputs to catch libsyck memory-safety defects; de-pin the libasan version so it tracks the runner's GCC (PR #213)

- updated to 1.460.0 (1.46) [Bug Fixes]
- Fix: preserve string nature of numeric-looking values in Dump; pure strings (POK only, no IOK/NOK) are now quoted to maintain roundtrip fidelity (GH #199, PR #200)
- Fix: accept trailing commas in flow sequences and mappings ([a, b,] and {a: 1,}), valid per YAML 1.0/1.1/1.2 spec (GH #195, PR #196)

[Maintenance]
- CI: upgrade install-with-cpm to v2 for compatibility with Perl versions prior to 5.24 in perldocker containers (GH #197, PR #198)
- Clean up MANIFEST.SKIP: add #!include_default, remove redundant entries, exclude .claude/ from distribution

Tenable has extracted the preceding description block directly from the SUSE 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 perl-YAML-Syck package.

Plugin Details

Severity: Critical

ID: 330582

File Name: openSUSE-2026-21452-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 7/29/2026

Updated: 7/29/2026

Supported Sensors: Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.89

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

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

CVSS Score Source: CVE-2026-57075

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

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

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

Vulnerability Information

CPE: cpe:/o:novell:opensuse:16.0, p-cpe:/a:novell:opensuse:perl-yaml-syck

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/27/2026

Vulnerability Publication Date: 10/16/2025

Reference Information

CVE: CVE-2025-11683, CVE-2026-13713, CVE-2026-57075, CVE-2026-57076, CVE-2026-57077

Detections

Analytics