ASA-2019-00517 – Apache HTTP Server: Stack buffer overflow and NULL pointer dereference in mod_remoteip

Posted on by Allele Security Intelligence in Alerts

Allele Security Alert

ASA-2019-00517

Identifier(s)

ASA-2019-00517, CVE-2019-10097

Title

Stack buffer overflow and NULL pointer dereference in mod_remoteip

Vendor(s)

The Apache Software Foundation

Product(s)

Apache HTTP Server

Affected version(s)

Apache HTTP Server versions 2.4.32 to 2.4.39

Fixed version(s)

Apache HTTP Server version 2.4.41

Proof of concept

Unknown

Description

When mod_remoteip was configured to use a trusted intermediary proxy server using the “PROXY” protocol, a specially crafted PROXY header could trigger a stack buffer overflow or NULL pointer deference. This vulnerability could only be triggered by a trusted proxy and not by untrusted HTTP clients.

Technical details

Unknown

Credits

Daniel McCarney (Let’s Encrypt / Internet Security Research Group (ISRG))

Reference(s)

httpd 2.4 vulnerabilities – The Apache HTTP Server Project
https://httpd.apache.org/security/vulnerabilities_24.html

CVE-2019-10097: mod_remoteip stack buffer overflow and NULL pointer dereference
https://seclists.org/oss-sec/2019/q3/140

Apache HTTP Server 2.4.41 Released
https://www.apache.org/dist/httpd/Announcement2.4.html

CVE-2019-10097
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-10097

CVE-2019-10097
https://nvd.nist.gov/vuln/detail/CVE-2019-10097

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Last modified: August 21, 2019

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