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CVE-2012-0021 Details

Description

The log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP Server 2.2.17 through 2.2.21, when a threaded MPM is used, does not properly handle a %{}C format string, which allows remote attackers to cause a denial of service (daemon crash) via a cookie that lacks both a name and a value.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041	CVE
http://httpd.apache.org/security/vulnerabilities_22.html	CVE	Vendor Advisory
http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html	CVE
http://marc.info/?l=bugtraq&m=133294460209056&w=2	CVE
http://marc.info/?l=bugtraq&m=133494237717847&w=2	CVE
http://rhn.redhat.com/errata/RHSA-2012-0542.html	CVE
http://rhn.redhat.com/errata/RHSA-2012-0543.html	CVE
https://bugzilla.redhat.com/show_bug.cgi?id=785065	CVE
http://secunia.com/advisories/48551	CVE
https://issues.apache.org/bugzilla/show_bug.cgi?id=52256	CVE	Patch
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E	CVE
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E	CVE
https://lists.apache.org/thread.html/r05b5357d1f6bd106f41541ee7d87aafe3f5ea4dc3e9bde5ce09baff8%40%3Ccvs.httpd.apache.org%3E	CVE
https://lists.apache.org/thread.html/r1d201e3da31a2c8aa870c8314623caef7debd74a13d0f25205e26f15%40%3Ccvs.httpd.apache.org%3E	CVE
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E	CVE
https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E	CVE
https://lists.apache.org/thread.html/r9b4b963760a3cb5a4a70c902f325c6c0337fe51d5b8570416f8f8729%40%3Ccvs.httpd.apache.org%3E	CVE
https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E	CVE
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E	CVE
https://lists.apache.org/thread.html/rad01d817195e6cc871cb1d73b207ca326379a20a6e7f30febaf56d24%40%3Ccvs.httpd.apache.org%3E	CVE
https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E	CVE
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E	CVE
https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E	CVE
http://support.apple.com/kb/HT5501	CVE
http://svn.apache.org/viewvc?view=revision&revision=1227292	CVE	Patch
http://www.mandriva.com/security/advisories?name=MDVSA-2012:012	CVE
http://www.mandriva.com/security/advisories?name=MDVSA-2013:150	CVE
http://www.oracle.com/technetwork/topics/security/cpujul2012-392727.html	CVE
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041	[email protected]
http://httpd.apache.org/security/vulnerabilities_22.html	[email protected]	Vendor Advisory
http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html	[email protected]
http://marc.info/?l=bugtraq&m=133294460209056&w=2	[email protected]
http://marc.info/?l=bugtraq&m=133494237717847&w=2	[email protected]
http://rhn.redhat.com/errata/RHSA-2012-0542.html	[email protected]
http://rhn.redhat.com/errata/RHSA-2012-0543.html	[email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=785065	[email protected]
http://secunia.com/advisories/48551	[email protected]
https://issues.apache.org/bugzilla/show_bug.cgi?id=52256	[email protected]	Patch
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E	[email protected]
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E	[email protected]
https://lists.apache.org/thread.html/r05b5357d1f6bd106f41541ee7d87aafe3f5ea4dc3e9bde5ce09baff8%40%3Ccvs.httpd.apache.org%3E	[email protected]
https://lists.apache.org/thread.html/r1d201e3da31a2c8aa870c8314623caef7debd74a13d0f25205e26f15%40%3Ccvs.httpd.apache.org%3E	[email protected]
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E	[email protected]
https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E	[email protected]
https://lists.apache.org/thread.html/r9b4b963760a3cb5a4a70c902f325c6c0337fe51d5b8570416f8f8729%40%3Ccvs.httpd.apache.org%3E	[email protected]
https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E	[email protected]
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E	[email protected]
https://lists.apache.org/thread.html/rad01d817195e6cc871cb1d73b207ca326379a20a6e7f30febaf56d24%40%3Ccvs.httpd.apache.org%3E	[email protected]
https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E	[email protected]
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E	[email protected]
https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E	[email protected]
http://support.apple.com/kb/HT5501	[email protected]
http://svn.apache.org/viewvc?view=revision&revision=1227292	[email protected]	Patch
http://www.mandriva.com/security/advisories?name=MDVSA-2012:012	[email protected]
http://www.mandriva.com/security/advisories?name=MDVSA-2013:150	[email protected]
http://www.oracle.com/technetwork/topics/security/cpujul2012-392727.html	[email protected]

see all 56 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-20	Improper Input Validation	[email protected]

Affected Products

Product	Versions
apache http server	2.2.17 2.2.18 2.2.19 2.2.20 2.2.21
CPE cpe:2.3:a:apache:http_server:2.2.17:::::::* cpe:2.3:a:apache:http_server:2.2.18:::::::* cpe:2.3:a:apache:http_server:2.2.19:::::::* cpe:2.3:a:apache:http_server:2.2.20:::::::* cpe:2.3:a:apache:http_server:2.2.21:::::::* Remediation No remediation found in references.

Change History

17 change records found show changes

Date	Action	Recorded By
Jun 16, 2026	CVE Modified	[email protected]
Apr 29, 2026	Status Change	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Nov 7, 2023	CVE Modified	[email protected]
Jun 6, 2021	CVE Modified	[email protected]
Jun 3, 2021	CVE Modified	[email protected]
Mar 30, 2021	CVE Modified	[email protected]
Mar 30, 2021	CVE Modified	[email protected]
Apr 1, 2020	CVE Modified	[email protected]
Apr 1, 2020	CVE Modified	[email protected]
Aug 15, 2019	CVE Modified	[email protected]
Jan 18, 2018	CVE Modified	[email protected]
Jan 9, 2018	CVE Modified	[email protected]
Dec 29, 2017	CVE Modified	[email protected]
Aug 23, 2016	CVE Modified	[email protected]
Jan 30, 2012	Initial Analysis	[email protected]