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 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.

CVSS v2.0

1.2 LOWAV:L/AC:H/Au:N/C:N/I:N/A:P

EPSS

3.10% chance of exploitation in the next 30 days, 87th percentile

Published

2011-11-08

Updated

2024-08-07

Proof-of-concept exploits (1)

• http://www.halfdog.net/Security/2011/ApacheModSetEnvIfIntegerOverflow/

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/41769

References

• CVE Record
• NVD entry

Related

• CVE-2011-4404
• CVE-2011-4431
• CVE-2011-4403
• CVE-2011-4448
• CVE-2011-4367
• CVE-2011-4449