CVE-2015-6321 Denial of service in n/a
Remote attackers can cause denial of service via TCP packet floods on Cisco Email, Content, and Web Security Appliances.
- 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-2015-6321?
CVE-2015-6321 is a high-severity denial of service vulnerability in Cisco Email Security Appliance, published on 6 Nov 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Cisco AsyncOS before 8.5.7-042, 9.x before 9.1.0-032, 9.1.x before 9.1.1-023, and 9.5.x and 9.6.x before 9.6.0-042 on Email Security Appliance (ESA) devices; before 9.1.0-032, 9.1.1 before 9.1.1-005, and 9.5.x before 9.5.0-025 on Content Security Management Appliance (SMA) devices; and before 7.7.0-725 and 8.x before 8.0.8-113 on Web Security Appliance (WSA) devices allows remote attackers to cause a denial of service (memory consumption) via a flood of TCP packets, aka Bug IDs CSCus79774, CSCus79777, and CSCzv95795.
Weakness: CWE-399
Which versions are affected by CVE-2015-6321?
It affects 3 products.
Products include Cisco Content Security Management Appliance, Cisco Email Security Appliance, Cisco Web Security Appliance.
How do I fix CVE-2015-6321?
No fix has been published for CVE-2015-6321 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-2015-6321 being exploited?
There is no known exploitation of CVE-2015-6321 in the wild and no public exploit code.
Other vulnerabilities in Cisco Email Security Appliance
Sources
Also known as GHSA-rmcx-cqh3-x8cj.