Upstream information

CVE-2022-23649 at MITRE

Description

Cosign provides container signing, verification, and storage in an OCI registry for the sigstore project. Prior to version 1.5.2, Cosign can be manipulated to claim that an entry for a signature exists in the Rekor transparency log even if it doesn't. This requires the attacker to have pull and push permissions for the signature in OCI. This can happen with both standard signing with a keypair and "keyless signing" with Fulcio. If an attacker has access to the signature in OCI, they can manipulate cosign into believing the entry was stored in Rekor even though it wasn't. The vulnerability has been patched in v1.5.2 of Cosign. The `signature` in the `signedEntryTimestamp` provided by Rekor is now compared to the `signature` that is being verified. If these don't match, then an error is returned. If a valid bundle is copied to a different signature, verification should fail. Cosign output now only informs the user that certificates were verified if a certificate was in fact verified. There is currently no known workaround.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 2.1
Vector AV:L/AC:L/Au:N/C:N/I:P/A:N
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 3.3 6.5
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack Vector Local Network
Attack Complexity Low Low
Privileges Required Low Low
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact Low High
Availability Impact None None
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1196239 [RESOLVED / FIXED]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
SUSE Linux Enterprise Desktop 15 SP4
SUSE Linux Enterprise High Performance Computing 15 SP4
SUSE Linux Enterprise Module for Basesystem 15 SP4
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server for SAP Applications 15 SP4
SUSE Manager Proxy 4.3
SUSE Manager Retail Branch Server 4.3
SUSE Manager Server 4.3
  • cosign >= 1.5.2-150400.1.7
Patchnames:
SUSE Linux Enterprise Module for Basesystem 15 SP4 GA cosign-1.5.2-150400.1.7
SUSE Linux Enterprise Desktop 15 SP5
SUSE Linux Enterprise High Performance Computing 15 SP5
SUSE Linux Enterprise Module for Basesystem 15 SP5
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server for SAP Applications 15 SP5
  • cosign >= 1.12.0-150400.3.6.1
Patchnames:
SUSE Linux Enterprise Module for Basesystem 15 SP5 GA cosign-1.12.0-150400.3.6.1
openSUSE Tumbleweed
  • cosign >= 1.5.2-1.1
Patchnames:
openSUSE-Tumbleweed-2024-11860


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise Desktop 15 SP5 cosign Already fixed
SUSE Linux Enterprise Desktop 15 SP6 cosign Already fixed
SUSE Linux Enterprise High Performance Computing 15 SP5 cosign Already fixed
SUSE Linux Enterprise High Performance Computing 15 SP6 cosign Already fixed
SUSE Linux Enterprise Module for Basesystem 15 SP5 cosign Already fixed
SUSE Linux Enterprise Module for Basesystem 15 SP6 cosign Already fixed
SUSE Linux Enterprise Server 15 SP5 cosign Already fixed
SUSE Linux Enterprise Server 15 SP6 cosign Already fixed
SUSE Linux Enterprise Server for SAP Applications 15 SP5 cosign Already fixed
SUSE Linux Enterprise Server for SAP Applications 15 SP6 cosign Already fixed
SUSE Manager Proxy 4.3 cosign Already fixed
SUSE Manager Retail Branch Server 4.3 cosign Already fixed
SUSE Manager Server 4.3 cosign Already fixed
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise Desktop 15 SP4 cosign Already fixed
SUSE Linux Enterprise High Performance Computing 15 SP4 cosign Already fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS cosign Already fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS cosign Already fixed
SUSE Linux Enterprise Module for Basesystem 15 SP4 cosign Already fixed
SUSE Linux Enterprise Server 15 SP4 cosign Already fixed
SUSE Linux Enterprise Server 15 SP4-LTSS cosign Already fixed
SUSE Linux Enterprise Server for SAP Applications 15 SP4 cosign Already fixed
Products past their end of life and not receiving proactive updates anymore.
SUSE Linux Enterprise Real Time 15 SP4 cosign Already fixed


SUSE Timeline for this CVE

CVE page created: Sat Feb 19 05:00:23 2022
CVE page last modified: Sun Jun 16 02:18:31 2024