Detections
Analytics
SCA: security update for github.com/sigstore/cosign, github.com/sigstore/cosign/v2 (GHSA-vfp6-jrw2-99g9)
medium Tenable Self-Hosted Container Security Plugin ID 419302
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- Cosign is a sigstore signing tool for OCI containers. Cosign is susceptible to a denial of service by an
attacker controlled registry. An attacker who controls a remote registry can return a high number of
attestations and/or signatures to Cosign and cause Cosign to enter a long loop resulting in an endless
data attack. The root cause is that Cosign loops through all attestations fetched from the remote registry
in pkg/cosign.FetchAttestations. The attacker needs to compromise the registry or make a request to a
registry they control. When doing so, the attacker must return a high number of attestations in the
response to Cosign. The result will be that the attacker can cause Cosign to go into a long or infinite
loop that will prevent other users from verifying their data. In Kyvernos case, an attacker whose
privileges are limited to making requests to the cluster can make a request with an image reference to
their own registry, trigger the infinite loop and deny other users from completing their admission
requests. Alternatively, the attacker can obtain control of the registry used by an organization and
return a high number of attestations instead the expected number of attestations. The issue can be
mitigated rather simply by setting a limit to the limit of attestations that Cosign will loop through. The
limit does not need to be high to be within the vast majority of use cases and still prevent the endless
data attack. This issue has been patched in version 2.2.1 and users are advised to upgrade.
(CVE-2023-46737)
See Also
Plugin Details
Severity: Medium
ID: 419302
Version: Revision 1.7
Type: Local
Family: SCA Checks
Published: 1/23/2025
Updated: 7/2/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 1.2
Percentile: 0.01
Vendor
Vendor Severity: Low
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.9
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS Score Source: CVE-2023-46737
CVSS v3
Risk Factor: Medium
Base Score: 5.3
Temporal Score: 4.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 11/8/2023
Vulnerability Publication Date: 11/7/2023
Reference Information
CVE: CVE-2023-46737