Improper input validation in SpamAssassin - CVE-2017-15705
Published: December 15, 2018 / Updated: December 17, 2018
Vulnerability identifier: #VU16549
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-15705
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Apache Foundation
Affected software:
SpamAssassin
SpamAssassin
Detailed vulnerability description
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists in Apache SpamAssassin, using HTML::Parser due to an the "open" event is immediately followed by a "close" event - even if the tag *does not* close in the HTML being parsed when an object and hook are setup into the begin and end tag event handlers. A remote attacker can supply certain unclosed tags in specially crafted emails that cause markup to be handled incorrectly leading to scan timeouts.
How to mitigate CVE-2017-15705
Update to version 3.4.2.