Out-of-bounds read in nginx - #VU26234
Published: March 19, 2020
Vulnerability identifier: #VU26234
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: N/A
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: F5 Networks
Affected software:
nginx
nginx
Detailed vulnerability description
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 updates from vendor's website.