Public Date:
447268: CVE-2008-1678 httpd: mod_ssl per-connection memory leak for connections with zlib compression

The MITRE CVE dictionary describes this issue as:

Memory leak in the zlib_stateful_init function in crypto/comp/c_zlib.c in libssl in OpenSSL 0.9.8f through 0.9.8h allows remote attackers to cause a denial of service (memory consumption) via multiple calls, as demonstrated by initial SSL client handshakes to the Apache HTTP Server mod_ssl that specify a compression algorithm.

Find out more about CVE-2008-1678 from the MITRE CVE dictionary dictionary and NIST NVD.


Not vulnerable. This issue did not affect the versions of mod_ssl or httpd as shipped with Red Hat Enterprise Linux 2.1, 3, 4, and 5 prior to 5.3.

In Red Hat Enterprise Linux 5.3, OpenSSL packages were rebased to upstream version 0.9.8e via RHBA-2009:0181 (, introducing this problem in Red Hat Enterprise Linux 5. Updated httpd packages were released via:

CVSS v2 metrics

Base Score 5
Base Metrics AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 5 (httpd) RHSA-2009:1075 2009-05-27
Last Modified

CVE description copyright © 2017, The MITRE Corporation