Detections
Analytics

TencentOS Server 3: container-tools:rhel8 (TSSA-2026:0661)

high Nessus Plugin ID 328403

Synopsis

The remote TencentOS Server 3 host is missing one or more security updates.

Description

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0661 advisory.

 Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:

 CVE-2026-33811:
 When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.

 CVE-2026-39835:
 SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil.

 CVE-2026-57231:
 Podman is a tool for managing OCI containers and pods. From 1.8.1 until 5.8.4, a container image that contains a environment variable with just a key and no value can trick podman into passing that variable from the host into the container. This is made worse by the fact that using an asterisk (*) will cause podman to pass all host variables into the container. So essentially a malicious image can exfiltrate all podman environment variables that are set in the session from where the container is launched. This vulnerability is fixed in 5.8.4 and 6.0.0.

Tenable has extracted the preceding description block directly from the Tencent 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

https://mirrors.tencent.com/tlinux/errata/tssa-20260661.xml

Plugin Details

Severity: High

ID: 328403

File Name: tencentos_TSSA_2026_0661.nasl

Version: 1.1

Type: Local

Published: 7/20/2026

Updated: 7/20/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 94.18

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-33811

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:tencent:tencentos_server:3, p-cpe:/a:tencent:tencentos_server:aardvark-dns, p-cpe:/a:tencent:tencentos_server:buildah, p-cpe:/a:tencent:tencentos_server:cockpit-podman, p-cpe:/a:tencent:tencentos_server:conmon, p-cpe:/a:tencent:tencentos_server:container-selinux, p-cpe:/a:tencent:tencentos_server:containernetworking-plugins, p-cpe:/a:tencent:tencentos_server:containers-common, p-cpe:/a:tencent:tencentos_server:criu, p-cpe:/a:tencent:tencentos_server:crun, p-cpe:/a:tencent:tencentos_server:fuse-overlayfs, p-cpe:/a:tencent:tencentos_server:libslirp, p-cpe:/a:tencent:tencentos_server:netavark, p-cpe:/a:tencent:tencentos_server:oci-seccomp-bpf-hook, p-cpe:/a:tencent:tencentos_server:podman, p-cpe:/a:tencent:tencentos_server:python-podman, p-cpe:/a:tencent:tencentos_server:runc, p-cpe:/a:tencent:tencentos_server:skopeo, p-cpe:/a:tencent:tencentos_server:slirp4netns, p-cpe:/a:tencent:tencentos_server:toolbox, p-cpe:/a:tencent:tencentos_server:udica

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/etc/os-release, Host/TencentOS/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 7/13/2026

Vulnerability Publication Date: 5/7/2026

Reference Information

CVE: CVE-2026-33811, CVE-2026-39835, CVE-2026-57231

IAVA: 2026-A-0659