GHSA-273p-m2cw-6833
Rekor's COSE v0.0.1 entry type nil pointer dereference in Canonicalize via empty Message
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | github.com/sigstore/rekor | < 1.5.0 | 1.5.0 |
Details
As written in the advisory (Markdown source, shown as plain text).
## Summary
Rekor’s cose v0.0.1 entry implementation can panic on attacker-controlled input when canonicalizing a proposed entry with an empty `spec.message`. `validate()` returns nil (success) when `message` is empty, leaving `sign1Msg` uninitialized, and `Canonicalize()` later dereferences `v.sign1Msg.Payload`.
## Impact
A malformed proposed entry of the `cose/v0.0.1` type can cause a panic on a thread within the Rekor process. The thread is recovered so the client receives a 500 error message and service still continues, so the availability impact of this is minimal.
## Patches
Upgrade to v1.5.0
## Workarounds
None
References
External links from the advisory. They lead to third-party sites.