Unscored severity · published Nov 8, 2011
CVE-2011-4415
The ap_pregsub function in server/util.c in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x through 2.2.21, when the mod_setenvif module is enabled, does not restrict the…
–
CVSS
3%
EPSS
No
On KEV
Description
The ap_pregsub function in server/util.c in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x through 2.2.21, when the mod_setenvif module is enabled, does not restrict the size of values of environment variables, which allows local users to cause a denial of service (memory consumption or NULL pointer dereference) via a .htaccess file with a crafted SetEnvIf directive, in conjunction with a crafted HTTP request header, related to (1) the "len +=" statement and (2) the apr_pcalloc function call, a different vulnerability than CVE-2011-3607.
Exploitation
Is it being used?
Exploit prediction (EPSS)3.0% · higher than 87% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HS
HTTP Server · Apache
2.0; 2.0.9; 2.0.28; 2.0.28; 2.0.32; 2.0.32; +34 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2011-4415
CVE.org
https://www.cve.org/CVERecord?id=CVE-2011-4415
h20000.www2.hp.com
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041
www.gossamer-threads.com
http://www.gossamer-threads.com/lists/apache/dev/403775
Exploit
http://www.halfdog.net/Security/2011/ApacheModSetEnvIfIntegerOverflow/
Exploit
http://www.halfdog.net/Security/2011/ApacheModSetEnvIfIntegerOverflow/DemoExploit.html
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