SB2019110722 - Ubuntu update for HAproxy
Published: November 7, 2019
Security Bulletin ID
SB2019110722
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2019-18277)
The vulnerability allows a remote attacker to perform HTTP request smuggling attack.
The vulnerability exists due to incorrect processing of messages with a missing transfer-encoding header, when HAProxy is configured in legacy mode. The server does not reject "chunked" value that combined with the "http-reuse always" setting can lead to HTTP request smuggling attack.
Remediation
Install update from vendor's website.