Signature Detail

DOS: Ascend Router (2)

This signature detects attempts to exploit a known vulnerability against Lucent routers. MAX Router 5.0, Pipeline Router 6.0, TNT Router 2.0, and all earlier versions are vulnerable. Attackers can send malformed packets to UDP/9 (Discard) to cause a denial of service (DoS) or crash the software.

Extended Description

Certain versions of Ascends (Lucent) router software listen on port 9 (UDP Discard). Ascend provides configuration tools for MAX and Pipeline routers that locate locally installed routers by broadcasting a specially formatted packet to UDP port 9. An attacker can send a similar but malformed packet to the same port that will cause MAX and Pipeline routers running certain software versions to crash.

Affected Products

• Lucent Ascend MAX Router 1.0.0
• Lucent Ascend MAX Router 2.0.0
• Lucent Ascend MAX Router 3.0.0
• Lucent Ascend MAX Router 4.0.0
• Lucent Ascend MAX Router 5.0.0
• Lucent Ascend Pipeline Router 1.0.0
• Lucent Ascend Pipeline Router 2.0.0
• Lucent Ascend Pipeline Router 3.0.0
• Lucent Ascend Pipeline Router 4.0.0
• Lucent Ascend Pipeline Router 5.0.0
• Lucent Ascend Pipeline Router 6.0.0
• Lucent Ascend TNT Router 1.0.0
• Lucent Ascend TNT Router 2.0.0

References

• BugTraq: 714
• CVE: CVE-1999-0060
• URL: http://ciac.llnl.gov/ciac/bulletins/i-038.shtml