CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H
AI Score
Confidence
High
SSVC
Exploitation
poc
Automatable
no
Technical Impact
partial
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.
[
{
"cpes": [
"cpe:2.3:a:sigstore:cosign:-:*:*:*:*:*:*:*"
],
"vendor": "sigstore",
"product": "cosign",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "2.2.4",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
}
]
github.com/sigstore/cosign/blob/14795db16417579fac0c00c11e166868d7976b61/pkg/cosign/verify.go#L948-L955
github.com/sigstore/cosign/blob/286a98a4a99c1b2f32f84b0d560e324100312280/pkg/oci/remote/signatures.go#L56-L70
github.com/sigstore/cosign/commit/629f5f8fa672973503edde75f84dcd984637629e
github.com/sigstore/cosign/releases/tag/v2.2.4
github.com/sigstore/cosign/security/advisories/GHSA-95pr-fxf5-86gv
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H
AI Score
Confidence
High
SSVC
Exploitation
poc
Automatable
no
Technical Impact
partial