SB2019051102 - Security restrictions bypass in HAProxy
Published: May 11, 2019
Security Bulletin ID
SB2019051102
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) Cryptographic issues (CVE-ID: CVE-2019-11323)
The vulnerability allows a remote attacker to bypass certain security restrictions.
The vulnerability exists due to incorrect reload with rotated keys, that results in usage of uninitialized, and very predictable, HMAC keys. A remote attacker can send a specially crafted request to the application and force it to use weak encryption.
Remediation
Install update from vendor's website.