CVE-2004-0751

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 72.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2004-10-20 · updated 2026-06-16

Description

The char_buffer_read function in the mod_ssl module for Apache 2.x, when using reverse proxying to an SSL server, allows remote attackers to cause a denial of service (segmentation fault).

Affected products

Apache HTTP Server: from 2.0.44 before 2.0.51 — fixed in 2.0.51

How to fix

Upgrade to a fixed version: Apache HTTP Server 2.0.51. Check the vendor advisory for mitigations.

References

http://archives.neohapsis.com/archives/bugtraq/2004-09/0096.html
http://issues.apache.org/bugzilla/show_bug.cgi?id=30134
http://www.gentoo.org/security/en/glsa/glsa-200409-21.xml
http://www.mandrakesecure.net/en/advisories/advisory.php?name=MDKSA-2004:096
http://www.novell.com/linux/security/advisories/2004_30_apache2.html
http://www.redhat.com/support/errata/RHSA-2004-463.html
http://www.trustix.org/errata/2004/0047/
https://exchange.xforce.ibmcloud.com/vulnerabilities/17273
https://lists.apache.org/thread.html/54a42d4b01968df1117cea77fc53d6beb931c0e05936ad02af93e9ac%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/5df9bfb86a3b054bb985a45ff9250b0332c9ecc181eec232489e7f79%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r0276683d8e1e07153fc8642618830ac0ade85b9ae0dc7b07f63bb8fc%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r2cb985de917e7da0848c440535f65a247754db8b2154a10089e4247b%40%3Ccvs.httpd.apache.org%3E

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