CVE-2015-6291 Denial of service in n/a
Remote attackers can cause denial of service via memory consumption by sending crafted email attachments to Cisco Email 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-2015-6291?
CVE-2015-6291 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 8.5.7-043, 9.x before 9.1.1-023, and 9.5.x and 9.6.x before 9.6.0-046 on Email Security Appliance (ESA) devices mishandles malformed fields during body-contains, attachment-contains, every-attachment-contains, attachment-binary-contains, dictionary-match, and attachment-dictionary-match filtering, which allows remote attackers to cause a denial of service (memory consumption) via a crafted attachment in an e-mail message, aka Bug ID CSCuv47151.
Weakness: CWE-20
Which versions are affected by CVE-2015-6291?
It affects 1 product.
Products include Cisco Email Security Appliance.
How do I fix CVE-2015-6291?
No fix has been published for CVE-2015-6291 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-2015-6291 being exploited?
There is no known exploitation of CVE-2015-6291 in the wild and no public exploit code.
Other vulnerabilities in Cisco Email Security Appliance
- CVE-2022-20798 Cisco Email Security Appliance and Cisco Secure Email and Web Manager External Authentication Bypass Vulnerability
- CVE-2022-20664 Cisco Email Security Appliance and Cisco Secure Email and Web Manager Information Disclosure Vulnerability
- CVE-2022-20960 Denial of service in Cisco Secure Email
- CVE-2018-0419 Security feature bypass in Email Security Appliance (ESA)
- CVE-2016-1480 Security feature bypass in Cisco AsyncOS through WSA10.0.0-000
Sources
Also known as GHSA-xmvm-48fw-3ghc.