CVE-2009-0629: Cisco IOS

Medium severity, CVSS 5.4. EPSS: 4% chance of exploitation in the next 30 days.

The (1) Airline Product Set (aka ALPS), (2) Serial Tunnel Code (aka STUN), (3) Block Serial Tunnel Code (aka BSTUN), (4) Native Client Interface Architecture (NCIA) support, (5) Data-link switching (aka DLSw), (6) Remote Source-Route Bridging (RSRB), (7) Point to Point Tunneling Protocol (PPTP), (8) X.25 for Record Boundary Preservation (RBP), (9) X.25 over TCP (XOT), and (10) X.25 Routing features in Cisco IOS 12.2 and 12.4 allows remote attackers to cause a denial of service (device reload) via a series of crafted TCP packets.

Affected products

• Cisco IOS: version 12.2 only; version 12.2b only; version 12.2bc only; version 12.2bw only; version 12.2bx only; version 12.2by only; …
• Cisco IOS XR: version 12.4 only

Published 2009-03-27. Last modified 2026-06-16.