Description

Cosign provides code signing and transparency for containers and binaries. Prior to version 2.2.4, a remote image with a malicious attachment can cause denial of service of the host machine running Cosign. This can impact other services on the machine that rely on having memory available such as a Redis database which can result in data loss. It can also impact the availability of other services on the machine that will not be available for the duration of the machine denial. The root cause of this issue is that Cosign reads the attachment from a remote image entirely into memory without checking the size of the attachment first. As such, a large attachment can make Cosign read a large attachment into memory; If the attachments size is larger than the machine has memory available, the machine will be denied of service. The Go runtime will make a SigKill after a few seconds of system-wide denial. This issue can allow a supply-chain escalation from a compromised registry to the Cosign user: If an attacher has compromised a registry or the account of an image vendor, they can include a malicious attachment and hurt the image consumer. Version 2.2.4 contains a patch for the vulnerability.

Severity

 

CVSS Version 3.x CVSS Version 2.0

CVSS 3.x Severity and Metrics:

NIST: NVD

Base Score:  N/A

NVD assessment not yet provided.

CNA:  GitHub, Inc.

Base Score:  4.2 MEDIUM

Vector:  CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings. A CNA provided score within the CVE List has been displayed.

CVSS 2.0 Severity and Metrics:

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://github.com/google/go-containerregistry/blob/a0658aa1d0cc7a7f1bcc4a3af9155335b6943f40/pkg/v1/remote/layer.go#L36-L40
https://github.com/sigstore/cosign/blob/9bc3ee309bf35d2f6e17f5d23f231a3d8bf580bc/pkg/oci/remote/remote.go#L228-L239
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-88jx-383q-w4qc

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-770	Allocation of Resources Without Limits or Throttling	GitHub, Inc.

Change History

1 change records found show changes

New CVE Received by NIST 4/10/2024 7:15:06 PM

Action	Type	Old Value	New Value
Added	CVSS V3.1		GitHub, Inc. AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H
Added	CWE		GitHub, Inc. CWE-770
Added	Description		Record truncated, showing 500 of 1203 characters. View Entire Change Record Cosign provides code signing and transparency for containers and binaries. Prior to version 2.2.4, a remote image with a malicious attachment can cause denial of service of the host machine running Cosign. This can impact other services on the machine that rely on having memory available such as a Redis database which can result in data loss. It can also impact the availability of other services on the machine that will not be available for the duration of the machine denial. The root cause of t
Added	Reference		GitHub, Inc. https://github.com/google/go-containerregistry/blob/a0658aa1d0cc7a7f1bcc4a3af9155335b6943f40/pkg/v1/remote/layer.go#L36-L40 [No types assigned]
Added	Reference		GitHub, Inc. https://github.com/sigstore/cosign/blob/9bc3ee309bf35d2f6e17f5d23f231a3d8bf580bc/pkg/oci/remote/remote.go#L228-L239 [No types assigned]
Added	Reference		GitHub, Inc. https://github.com/sigstore/cosign/commit/629f5f8fa672973503edde75f84dcd984637629e [No types assigned]
Added	Reference		GitHub, Inc. https://github.com/sigstore/cosign/releases/tag/v2.2.4 [No types assigned]
Added	Reference		GitHub, Inc. https://github.com/sigstore/cosign/security/advisories/GHSA-88jx-383q-w4qc [No types assigned]