CVE-2016-6455 Denial of service in Cisco StarOS 18.x through 21.x
An unauthenticated remote attacker can disconnect subscriber sessions on Cisco ASR 5500 routers, causing a partial denial of service.
- 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-2016-6455?
CVE-2016-6455 is a high-severity denial of service vulnerability in Cisco StarOS 18.x through 21.x, published on 3 Nov 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the Slowpath of StarOS for Cisco ASR 5500 Series routers with Data Processing Card 2 (DPC2) could allow an unauthenticated, remote attacker to cause a subset of the subscriber sessions to be disconnected, resulting in a partial denial of service (DoS) condition. This vulnerability affects Cisco ASR 5500 devices with Data Processing Card 2 (DPC2) running StarOS 18.0 or later. More Information: CSCvb12081. Known Affected Releases: 18.7.4 19.5.0 20.0.2.64048 20.2.3 21.0.0. Known Fixed Releases: 18.7.4 18.7.4.65030 18.8.M0.65044 19.5.0 19.5.0.65092 19.5.M0.65023 19.5.M0.65050 20.2.3 20.2.3.64982 20.2.3.65017 20.2.a4.65307 20.3.M0.64984 20.3.M0.65029 20.3.M0.65037 20.3.M0.65071 20.3.T0.64985 20.3.T0.65031 20.3.T0.65043 20.3.T0.65067 21.0.0 21.0.0.65256 21.0.M0.64922 21.0.M0.64983 21.0.M0.65140 21.0.V0.65150 21.1.A0.64932 21.1.A0.64987 21.1.A0.65145 21.1.PP0.65270 21.1.R0.65130 21.1.R0.65135 21.1.R0.65154 21.1.VC0.65203 21.2.A0.65147.
Weakness: CWE-399
Which versions are affected by CVE-2016-6455?
It affects 1 product.
Products include Cisco Asr 5000 Software.
How do I fix CVE-2016-6455?
No fix has been published for CVE-2016-6455 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-2016-6455 being exploited?
There is no known exploitation of CVE-2016-6455 in the wild and no public exploit code.
Other vulnerabilities in Cisco StarOS 18.x through 21.x
- CVE-2017-6729 Denial of service in Cisco StarOS
- CVE-2016-1436 Denial of service in n/a
- CVE-2017-6773 Command injection in StarOS for ASR 5000 Series Aggregated Services Routers
- CVE-2017-6775 Privilege escalation in StarOS for ASR 5000 Series Aggregated Services Routers
- CVE-2017-6774 Path traversal in StarOS for ASR 5000 Series Aggregated Services Routers
Sources
Also known as GHSA-c5xh-8h52-w9w3.