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CVE-2011-4415

LOW · CVSS 1.2EPSS 3.0%EU EUVD

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.

Key facts

CVSS score
1.2 (v2.0)
Severity
LOW
CVSS vector
AV:L/AC:H/Au:N/C:N/I:N/A:P
Weakness (CWE)
CWE-20
EPSS score
3.0% (88th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2011-4344)
Published
November 8, 2011
NVD last modified
June 16, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-4344 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

  • apache / http server
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and 5 more…

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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