CVEvulnerability

CVE-2006-4650

2.6 LOW Published 2006-09-09 Modified 2026-06-16 Official page ↗
Status
Modified
Published
2006-09-09
Last modified
2026-06-16
Assigner
[email protected]
CVSS 2.0 ([email protected])
2.6 LOW — AV:N/AC:H/Au:N/C:P/I:N/A:N

Description

Cisco IOS 12.0, 12.1, and 12.2, when GRE IP tunneling is used and the RFC2784 compliance fixes are missing, does not verify the offset field of a GRE packet during decapsulation, which leads to an integer overflow that references data from incorrect memory locations, which allows remote attackers to inject crafted packets into the routing queue, possibly bypassing intended router ACLs.

Affected configurations

• cisco ios 12.0 • cisco ios 12.1 • cisco ios 12.2

References