CVE-2011-4661 Denial of service in IOS
A memory leak in the HTTP PROXY Server process can cause a denial of service when specific security and authentication features are enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2011-4661?
CVE-2011-4661 is a high-severity denial of service vulnerability in Cisco Ios, published on 12 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A memory leak vulnerability exists in Cisco IOS before 15.2(1)T due to a memory leak in the HTTP PROXY Server process (aka CSCtu52820), when configured with Cisco ISR Web Security with Cisco ScanSafe and User Authenticaiton NTLM configured.
Weakness: CWE-772
Which versions are affected by CVE-2011-4661?
It affects 1 product.
Products include Cisco Ios.
How do I fix CVE-2011-4661?
No fix has been published for CVE-2011-4661 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2011-4661 being exploited?
There is no known exploitation of CVE-2011-4661 in the wild and no public exploit code.
Other vulnerabilities in Cisco Ios
- CVE-2017-12240 Cisco IOS and IOS XE Software DHCP Remote Code Execution
- CVE-2017-3881 Cisco IOS and IOS XE Remote Code Execution
- CVE-2018-0167 Cisco IOS, XR, and XE Software Buffer Overflow
- CVE-2017-6736 Cisco IOS and IOS XE Software SNMP Remote Code Execution
- CVE-2017-6737 Cisco IOS and IOS XE Software SNMP Remote Code Execution
Sources
Also known as GHSA-97hh-xg4h-8gvc.