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Date: Wed, 14 Aug 2019 15:50:09 -0500
From: Daniel Ruggeri <druggeri@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2019-10097: mod_remoteip stack buffer overflow and NULL pointer dereference


CVE-2019-10097: mod_remoteip stack buffer overflow and NULL pointer dereference

Severity: Moderate

Vendor: The Apache Software Foundation

Versions Affected:
httpd 2.4.32 to 2.4.39

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.

PROXY protocol support was added to mod_remoteip in release 2.4.33.

Mitigation:
All httpd users should upgrade to 2.4.41 or later.

Credit:
The issue was discovered by Daniel McCarney <cpu@...sencrypt.org> Let's Encrypt / Internet Security Research Group (ISRG)

References:
https://httpd.apache.org/security/vulnerabilities_24.html

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