CVE-2017-3818 Security feature bypass in Cisco AsyncOS 9.7.1-066

What is CVE-2017-3818?

CVE-2017-3818 is a medium-severity vulnerability in Cisco AsyncOS 9.7.1-066, published on 3 Feb 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the Multipurpose Internet Mail Extensions (MIME) scanner of Cisco AsyncOS Software for Cisco Email Security Appliances (ESA) could allow an unauthenticated, remote attacker to bypass configured user filters on the device, aka a Malformed MIME Header Filtering Bypass. This vulnerability affects all releases prior to the first fixed release of Cisco AsyncOS Software for Cisco Email Security Appliances, both virtual and hardware appliances, if the software is configured to apply a message filter or content filter to incoming email attachments. More Information: CSCvb65245. Known Affected Releases: 9.7.1-066. Known Fixed Releases: 9.8.0-092.

Weakness: CWE-20

Which versions are affected by CVE-2017-3818?

It affects 1 product.

Products include Cisco Email Security Appliance Firmware.

How do I fix CVE-2017-3818?

No fix has been published for CVE-2017-3818 yet. Limit exposure of the affected software until one is available.

Is CVE-2017-3818 being exploited?

There is no known exploitation of CVE-2017-3818 in the wild and no public exploit code.

Other vulnerabilities in Cisco AsyncOS 9.7.1-066

• CVE-2016-6406 Auth bypass in n/a Critical 9.8
• CVE-2018-15453 Cisco Email Security Appliance Memory Corruption Denial of Service Vulnerability High 8.6
• CVE-2017-6671 Security feature bypass in Cisco Email Security Appliance High 7.5
• CVE-2016-6458 Security feature bypass in Cisco AsyncOS 10.0.0-125 and 9.7.1-066 High 7.5
• CVE-2019-12706 Cisco Email Security Appliance Filter Bypass Vulnerability Medium 6.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-hhrh-pc24-4cm9.