CVE-2016-6421 Denial of service in n/a
Remote attackers can cause a denial of service by sending crafted OSPF Link State Advertisement updates to Cisco IOS XR devices.
- 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-2016-6421?
CVE-2016-6421 is a medium-severity denial of service vulnerability in Cisco Ios Xr, published on 5 Oct 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Cisco IOS XR 5.2.2 allows remote attackers to cause a denial of service (process restart) via a crafted OSPF Link State Advertisement (LSA) update, aka Bug ID CSCvb05643.
Weakness: CWE-399
Which versions are affected by CVE-2016-6421?
It affects 1 product.
Products include Cisco Ios Xr.
How do I fix CVE-2016-6421?
No fix has been published for CVE-2016-6421 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-2016-6421 being exploited?
There is no known exploitation of CVE-2016-6421 in the wild and no public exploit code.
Other vulnerabilities in Cisco Ios Xr
- CVE-2020-3118 Cisco IOS XR Software Discovery Protocol Format String
- CVE-2020-3569 Cisco IOS XR Software DVMRP Memory Exhaustion
- CVE-2020-3566 Cisco IOS XR Software DVMRP Memory Exhaustion
- CVE-2010-3035 Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service
- CVE-2022-20821 Cisco IOS XR Open Port
Sources
Also known as GHSA-p9ch-7c57-q9hh.