SB2020031927 - Information disclosure in nginx
Published: March 19, 2020
Security Bulletin ID
SB2020031927
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Out-of-bounds read (CVE-ID: N/A)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when processing rewrite rules with a '\0' character in ngx_http_core_module.c. An attacker with ability to influence a rewrite rule can view memory contents via Location HTTP header.
Successful exploitation of vulnerability requires that an attacker can influence rewrite engine, as demonstrated with OpenResty issue.
Remediation
Install update from vendor's website.