CVE-2011-4415

low Apache
CVSS v3 Base Score
1.2
AV:L/AC:H/Au:N/C:N/I:N/A:P
EPSS Score
0.5%
Exploitation probability in 30 days
Top 36% most likely to be exploited
Attack Characteristics
Attack Vector
Local
Attack Complexity
High
Confidentiality
None
Integrity
None
Availability
P
Published: November 8, 2011 (5301 days ago)
Last Modified: April 29, 2026
Vendor: Apache
Source: NVD

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.

CWE

CWE-20

Affected Products

apache http server

References

🔗 h20000.www2.hp.com 🔗 www.gossamer-threads.com 🔗 www.halfdog.net 🔗 www.halfdog.net 🔗 h20000.www2.hp.com