Improper input validation in Apache HTTP Server
CVE-2012-0021
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v2 metric
CVSS v2 base score 2.6 (Low). Vector: AV:N/AC:H/Au:N/C:N/I:N/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.303 (98.2th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.308 · newest: 0.303 · change: -0.005
Affected products
- Apache HTTP Server — versions 2.2.17, 2.2.18, 2.2.19
Weakness classification (CWE)
Public proof-of-concept exploits
References
- svn.apache.org/viewvc (Patch)
- h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp (vendor-advisory)
- www.mandriva.com/security/advisories (vendor-advisory)
- rhn.redhat.com/errata/RHSA-2012-0543.html (vendor-advisory)
- marc.info/ (vendor-advisory)
- issues.apache.org/bugzilla/show_bug.cgi (Patch)
- bugzilla.redhat.com/show_bug.cgi
- rhn.redhat.com/errata/RHSA-2012-0542.html (vendor-advisory)
- httpd.apache.org/security/vulnerabilities_22.html (Vendor Advisory)
- lists.apple.com/archives/security-announce/2012/Sep/msg00004.html (vendor-advisory)
Frequently asked questions
- What is CVE-2012-0021?
- CVE-2012-0021 is a vulnerability in Apache HTTP Server, classified under Improper Input Validation. Published 2012-01-28.
- Is CVE-2012-0021 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.