Bug 2274504 (CVE-2024-29903)

Summary:	CVE-2024-29903 cosign: Malicious artifects can cause machine-wide denial of service
Product:	[Other] Security Response	Reporter:	Marco Benatto <mbenatto>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	cosign 2.2.4	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Cosign package where maliciously crafted software artifacts can trigger uncontrolled resource consumption by allocating too much memory and starving out the system. A successful attack may result in a denial of service of the machine running Cosign, impacting availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2274506

Description Marco Benatto 2024-04-11 12:29:35 UTC

Cosign provides code signing and transparency for containers and binaries. Prior to version 2.2.4, maliciously-crafted software artifacts can cause denial of service of the machine running Cosign thereby impacting all services on the machine. The root cause is that Cosign creates slices based on the number of signatures, manifests or attestations in untrusted artifacts. As such, the untrusted artifact can control the amount of memory that Cosign allocates. The exact issue is Cosign allocates excessive memory on the lines that creates a slice of the same length as the manifests. Version 2.2.4 contains a patch for the vulnerability.

https://github.com/sigstore/cosign/blob/14795db16417579fac0c00c11e166868d7976b61/pkg/cosign/verify.go#L948-L955
https://github.com/sigstore/cosign/blob/286a98a4a99c1b2f32f84b0d560e324100312280/pkg/oci/remote/signatures.go#L56-L70
https://github.com/sigstore/cosign/commit/629f5f8fa672973503edde75f84dcd984637629e
https://github.com/sigstore/cosign/releases/tag/v2.2.4
https://github.com/sigstore/cosign/security/advisories/GHSA-95pr-fxf5-86gv

Comment 2 errata-xmlrpc 2024-07-24 16:18:43 UTC

This issue has been addressed in the following products:

  Red Hat Advanced Cluster Security 4.5

Via RHSA-2024:4836 https://access.redhat.com/errata/RHSA-2024:4836