CVE-2017-6721 Denial of service in Cisco Wide Area Application Services
Remote unauthenticated attackers can cause a denial of service by sending fragmented TCP packets to Cisco WAAS 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-2017-6721?
CVE-2017-6721 is a medium-severity denial of service vulnerability in Cisco Wide Area Application Services, published on 4 Jul 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the ingress processing of fragmented TCP packets by Cisco Wide Area Application Services (WAAS) could allow an unauthenticated, remote attacker to cause the WAASNET process to restart unexpectedly, causing a denial of service (DoS) condition. More Information: CSCvc57428. Known Affected Releases: 6.3(1). Known Fixed Releases: 6.3(0.143) 6.2(3c)6 6.2(3.22).
Weakness: CWE-20
Which versions are affected by CVE-2017-6721?
It affects 1 product.
Products include Cisco Wide Area Application Services.
How do I fix CVE-2017-6721?
No fix has been published for CVE-2017-6721 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-2017-6721 being exploited?
There is no known exploitation of CVE-2017-6721 in the wild and no public exploit code.
Other vulnerabilities in Cisco Wide Area Application Services
Sources
Also known as GHSA-w93q-4q5r-8jfj.