Description
Grid Community Toolkit before 6.2.20261111 (globus-gss-assist before 12.9) contains a heap out-of-bounds write in globus_gss_assist_token_get_fd() triggered by SSLv2 record lengths below 3. Remote unauthenticated clients can send a crafted GSI handshake record to services like globus-gatekeeper and myproxy to corrupt heap memory and crash the service.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Grid Community Forum | Grid Community Toolkit | < 6.2.20261111 | 6.2.20261111 |
| Grid Community Forum | globus-gss-assist | < 12.9 | 12.9 |
References
- https://gridcf.org/#2026-11-11 vendor-advisory
- https://github.com/gridcf/gct/commit/3df2be4834c146bdcec90009a0f2e5771ff63cca patch
- Grid Community Toolkit v6.2.20261111 Release Notes release-notes
- https://github.com/gridcf/gct/blob/v6.2.20190829/gsi/gss_assist/source/tokens_f.c technical-description
- VulnCheck Advisory: Grid Community Toolkit globus-gss-assist before 12.9 Pre-Authentication Heap Out-of-Bounds Write third-party-advisory