CVE-2016-6458 Security feature bypass in Cisco AsyncOS 10.0.0-125 and 9.7.1-066

High 7.5 Published 19 Nov 2016 Updated 6 Aug 2024

Unauthenticated attackers can bypass email content filters on Cisco Email Security Appliances if attachment filtering is enabled, allowing malicious emails to pass through.

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-2016-6458?

CVE-2016-6458 is a high-severity vulnerability in Cisco AsyncOS 10.0.0-125 and 9.7.1-066, published on 19 Nov 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the content filtering functionality of Cisco AsyncOS Software for Cisco Email Security Appliances could allow an unauthenticated, remote attacker to bypass content filters configured on an affected device. Email that should have been filtered could instead be forwarded by the device. 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 use a content filter for email attachments that are protected or encrypted. More Information: CSCva52546. Known Affected Releases: 10.0.0-125 9.7.1-066.

Weakness: CWE-20

Which versions are affected by CVE-2016-6458?

It affects 1 product.

Products include Cisco Email Security Appliance Firmware.

How do I fix CVE-2016-6458?

No fix has been published for CVE-2016-6458 yet. Limit exposure of the affected software until one is available.

Is CVE-2016-6458 being exploited?

There is no known exploitation of CVE-2016-6458 in the wild and no public exploit code.

Sources

Also known as GHSA-59rc-rp6p-jq6c.