Improper Input Validation Affecting apache2 package, versions <2.4.1-1


Severity

Recommended
0.0
low
0
10

Based on Debian security rating.

Threat Intelligence

EPSS
0.05% (20th percentile)

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  • Snyk IDSNYK-DEBIAN9-APACHE2-391808
  • published8 Nov 2011
  • disclosed8 Nov 2011

Introduced: 8 Nov 2011

CVE-2011-4415  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Debian:9 apache2 to version 2.4.1-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream apache2 package and not the apache2 package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

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 Scores

version 3.1