SB2018101909 - Amazon Linux AMI update for spamassassin
Published: October 19, 2018
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Improper input validation (CVE-ID: CVE-2017-15705)
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.
2) Improper input validation (CVE-ID: CVE-2018-11780)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a remote code execution bug in the PDFInfo plug-in when handling malicious input. A remote unauthenticated attacker can trick the victim into opening a specially crafted email message and execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
3) Code injection (CVE-ID: CVE-2018-11781)
The vulnerability allows a local attacker to execute arbitrary code on the target system.
The vulnerability exists due to a code injection condition in the meta rule syntax that exists when rules are processed by the affected software. A local attacker can supply specially crafted data and execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.