Description
accel-ppp before 1.15.0 contains a heap buffer overflow vulnerability in the tcp, syslog and pgsql log targets that allows unauthenticated remote peers to overflow fixed heap buffers by producing log lines exceeding LOG_MAX_SIZE. Attackers within client-ip-range can send an L2TP Start-Control-Connection-Request with many string AVPs when verbose logging is enabled to corrupt heap memory and crash the daemon.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| accel-ppp | accel-ppp | < 1.15.0 | 1.15.0 |
References
- https://github.com/accel-ppp/accel-ppp/pull/374 issue-tracking patch
- https://github.com/accel-ppp/accel-ppp/commit/58e399400c4ef4b71472ab7c2c71c54a677a05a8 patch
- accel-ppp 1.15.0 Release Notes release-notes
- https://github.com/accel-ppp/accel-ppp/blob/048d31cb446879e0d1a1471b4ab99135a92bf289/accel-pppd/logs/log_tcp.c#L55-L67 technical-description
- VulnCheck Advisory: accel-ppp before 1.15.0 Heap-based Buffer Overflow via oversized log lines in log_tcp/log_syslog/log_pgsql third-party-advisory