CVE-2011-4415

lowpriority · track · 16EPSS 0.030 · 87 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

3.02% (87th) EPSS

CVSS 1.2 · low

Is it mine?

54 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

1.2

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.01.2lowAV:L/AC:H/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 1.9 · impact 2.9

v2.01.1lowAV:L/AC:H/Au:N/C:N/I:N/A:P/E:POCsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimary

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-41769Apache < 2.0.64 / < 2.2.21 mod_setenvif - Integer OverflowPoC · exploit_db

affected products (54)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
apache http server= 2.0nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.28nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.32nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.34nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.35nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.36nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.37nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.38nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.39nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.40nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.41nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.42nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.43nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.44nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.45nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.46nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.47nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.48nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server= 2.0.49nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

showing 20 of 54

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2011-11-08modified 2026-06-16

related (25,193)

Related entries.

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+25188 more

references (11)

External citations — patches, advisories, analysis.

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