SUSE SLED15 / SLES15 Security Update : cosign (SUSE-SU-2022:3486-1)

medium Nessus Plugin ID 165617

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Synopsis

The remote SUSE host is missing a security update.

Description

The remote SUSE Linux SLED15 / SLES15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2022:3486-1 advisory.

- Cosign is a project under the sigstore organization which aims to make signatures invisible infrastructure. In versions prior to 1.12.0 a number of vulnerabilities have been found in cosign verify- blob, where Cosign would successfully verify an artifact when verification should have failed. First a cosign bundle can be crafted to successfully verify a blob even if the embedded rekorBundle does not reference the given signature. Second, when providing identity flags, the email and issuer of a certificate is not checked when verifying a Rekor bundle, and the GitHub Actions identity is never checked. Third, providing an invalid Rekor bundle without the experimental flag results in a successful verification. And fourth an invalid transparency log entry will result in immediate success for verification. Details and examples of these issues can be seen in the GHSA-8gw7-4j42-w388 advisory linked.
Users are advised to upgrade to 1.12.0. There are no known workarounds for these issues. (CVE-2022-36056)

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

Solution

Update the affected cosign package.

See Also

https://bugzilla.suse.com/1203430

http://www.nessus.org/u?2c21c966

https://www.suse.com/security/cve/CVE-2022-36056

Plugin Details

Severity: Medium

ID: 165617

File Name: suse_SU-2022-3486-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 10/2/2022

Updated: 10/2/2022

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

Vector: AV:N/AC:L/Au:N/C:N/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2022-36056

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:cosign, cpe:/o:novell:suse_linux:15

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: 10/1/2022

Vulnerability Publication Date: 9/14/2022

Reference Information

CVE: CVE-2022-36056

SuSE: SUSE-SU-2022:3486-1