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Vulnerability details: VCID-js2f-s8sz-aaan
Vulnerability ID VCID-js2f-s8sz-aaan
Aliases CVE-2012-0021
Summary 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.
Status Published
Exploitability 2.0
Weighted Severity 6.2
Risk 10.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-20 Improper Input Validation
CWE-476 NULL Pointer Dereference
System Score Found at
rhas Moderate https://access.redhat.com/errata/RHSA-2012:0542
rhas Moderate https://access.redhat.com/errata/RHSA-2012:0543
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.3296 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.364 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.364 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.364 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.364 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.364 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.364 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.364 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.364 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.364 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.40993 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.92033 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.92033 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.92388 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.92388 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.92388 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.92388 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.92388 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.92388 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.92388 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.92388 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.92388 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.92388 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.93198 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
epss 0.93198 https://api.first.org/data/v1/epss?cve=CVE-2012-0021
apache_httpd low https://httpd.apache.org/security/json/CVE-2012-0021.json
cvssv2 2.6 https://nvd.nist.gov/vuln/detail/CVE-2012-0021
Reference id Reference type URL
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041
http://httpd.apache.org/security/vulnerabilities_22.html
http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html
http://marc.info/?l=bugtraq&m=133294460209056&w=2
http://marc.info/?l=bugtraq&m=133494237717847&w=2
http://rhn.redhat.com/errata/RHSA-2012-0542.html
http://rhn.redhat.com/errata/RHSA-2012-0543.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2012-0021.json
https://api.first.org/data/v1/epss?cve=CVE-2012-0021
https://bugzilla.redhat.com/show_bug.cgi?id=785065
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0021
http://secunia.com/advisories/48551
https://issues.apache.org/bugzilla/show_bug.cgi?id=52256
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r05b5357d1f6bd106f41541ee7d87aafe3f5ea4dc3e9bde5ce09baff8@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r05b5357d1f6bd106f41541ee7d87aafe3f5ea4dc3e9bde5ce09baff8%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r1d201e3da31a2c8aa870c8314623caef7debd74a13d0f25205e26f15@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r1d201e3da31a2c8aa870c8314623caef7debd74a13d0f25205e26f15%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r9b4b963760a3cb5a4a70c902f325c6c0337fe51d5b8570416f8f8729@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r9b4b963760a3cb5a4a70c902f325c6c0337fe51d5b8570416f8f8729%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rad01d817195e6cc871cb1d73b207ca326379a20a6e7f30febaf56d24@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rad01d817195e6cc871cb1d73b207ca326379a20a6e7f30febaf56d24%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E
http://support.apple.com/kb/HT5501
http://svn.apache.org/viewvc?view=revision&revision=1227292
http://www.mandriva.com/security/advisories?name=MDVSA-2012:012
http://www.mandriva.com/security/advisories?name=MDVSA-2013:150
http://www.oracle.com/technetwork/topics/security/cpujul2012-392727.html
cpe:2.3:a:apache:http_server:2.2.17:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apache:http_server:2.2.17:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.18:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apache:http_server:2.2.18:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.19:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apache:http_server:2.2.19:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.20:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apache:http_server:2.2.20:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.21:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apache:http_server:2.2.21:*:*:*:*:*:*:*
CVE-2012-0021 https://httpd.apache.org/security/json/CVE-2012-0021.json
CVE-2012-0021 https://nvd.nist.gov/vuln/detail/CVE-2012-0021
GLSA-201206-25 https://security.gentoo.org/glsa/201206-25
RHSA-2012:0542 https://access.redhat.com/errata/RHSA-2012:0542
RHSA-2012:0543 https://access.redhat.com/errata/RHSA-2012:0543
USN-1368-1 https://usn.ubuntu.com/1368-1/
No exploits are available.
Vector: AV:N/AC:H/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2012-0021
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Exploit Prediction Scoring System (EPSS)
Percentile 0.9654
EPSS Score 0.3296
Published At April 11, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.