CVE-2019-1905 Cisco Email Security Appliance GZIP Content Filter Bypass Vulnerability
An unauthenticated remote attacker can bypass email content filters by sending malicious files in crafted GZIP archives, allowing unwanted emails to reach recipients.
- 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-2019-1905?
CVE-2019-1905 is a medium-severity vulnerability in Cisco Email Security Appliance, published on 20 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the GZIP decompression engine of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass configured content filters on the device. The vulnerability is due to improper validation of GZIP-formatted files. An attacker could exploit this vulnerability by sending a malicious file inside a crafted GZIP-compressed file. A successful exploit could allow the attacker to bypass configured content filters that would normally drop the email.
Weakness: CWE-20
Which versions are affected by CVE-2019-1905?
It affects 1 product.
Products include Cisco Email Security Appliance.
How do I fix CVE-2019-1905?
No fix has been published for CVE-2019-1905 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-1905 being exploited?
There is no known exploitation of CVE-2019-1905 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-2015-6291 Denial of service in n/a
- 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)
Sources
Also known as GHSA-q65g-mrgj-hv5j.