What’s Vulnerable › Vulnerabilities

CVE-2007-1863

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 11.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2007-06-27 · updated 2026-06-16

Description

cache_util.c in the mod_cache module in Apache HTTP Server (httpd), when caching is enabled and a threaded Multi-Processing Module (MPM) is used, allows remote attackers to cause a denial of service (child processing handler crash) via a request with the (1) s-maxage, (2) max-age, (3) min-fresh, or (4) max-stale Cache-Control headers without a value.

Affected products

• Apache HTTP Server: from 2.0.37 before 2.0.61; from 2.2.0 before 2.2.6 — fixed in 2.0.61, 2.2.6
• Apple Mac Os X Server: 10.0, 10.1, 10.1.1, 10.1.2, 10.1.3, 10.1.4 (+30)

How to fix

Upgrade to a fixed version: Apache HTTP Server 2.0.61, 2.2.6. Check the vendor advisory for mitigations.

References

• http://bugs.gentoo.org/show_bug.cgi?id=186219
• http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=244658
• http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01178795
• http://httpd.apache.org/security/vulnerabilities_20.html
• http://httpd.apache.org/security/vulnerabilities_22.html
• http://lists.apple.com/archives/security-announce/2008//May/msg00001.html
• http://lists.vmware.com/pipermail/security-announce/2009/000062.html
• http://osvdb.org/37079
• http://rhn.redhat.com/errata/RHSA-2007-0534.html
• http://rhn.redhat.com/errata/RHSA-2007-0556.html
• http://secunia.com/advisories/25830
• http://secunia.com/advisories/25873

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