Resource exhaustion in Cisco IOS - CVE-2011-1640
Published: October 22, 2011 / Updated: January 21, 2021
Vulnerability identifier: #VU49912
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2011-1640
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly support a large number of LLDP Management Address (MA) TLVs in ethernet-lldp component in Cisco IOS. A remote attacker can trigger resource exhaustion via specially crafted LLDPDUs and perform a denial of service (DoS) attack.
Affected software
Cisco IOS
How to mitigate CVE-2011-1640
Install updates from vendor's website.
Cisco IOS - update to 12.2.33 SXJ1