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CVE-2011-2767

35
FAUCET Score

CVE-2011-2767 describes a critical vulnerability in mod_perl versions 2.0 through 2.0.10, affecting Apache HTTP Server installations on various Linux distributions including Canonical, Debian, and Red Hat. This flaw allows unprivileged users to execute arbitrary Perl code by embedding it within a .htaccess file, contrary to expected administrative controls. With a CVSS score of 9.8 (CRITICAL), this vulnerability presents a severe risk, as it can be exploited remotely with low complexity, leading to complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0.0, <= 2.0.10CPE matchmatch criteria
cpe:2.3:a:apache:mod_perl:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
6.7CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:6.7:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
8.95%
Probability of exploitation in next 30 days
EPSS Percentile
94.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0895 is in the 90th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (12)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: mod_perl-0:2.0.4-12.el6_10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: rh-perl524-mod_perl-0:2.0.9-10.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: rh-perl524-mod_perl-0:2.0.9-10.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-perl526-mod_perl-0:2.0.10-10.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-perl524-mod_perl-0:2.0.9-10.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUSFixed in: rh-perl526-mod_perl-0:2.0.10-10.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUSFixed in: rh-perl524-mod_perl-0:2.0.9-10.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: rh-perl526-mod_perl-0:2.0.10-10.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: rh-perl524-mod_perl-0:2.0.9-10.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: rh-perl526-mod_perl-0:2.0.10-10.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: rh-perl524-mod_perl-0:2.0.9-10.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: mod_perl

Vendor Advisories (1)

redhatCVE-2011-2767Important

mod_perl: arbitrary Perl code execution in the context of the user account via a user-owned .htaccess

Oct 3, 2011

References

lists.opensuse.org / opensuse-security-announce/2019-11/msg00063.html
lists.opensuse.org / opensuse-security-announce/2019-11/msg00065.html
access.redhat.com / errata/RHSA-2018:2737
Third Party Advisory
access.redhat.com / errata/RHSA-2018:2825
Third Party Advisory
access.redhat.com / errata/RHSA-2018:2826
Third Party Advisory
bugs.debian.org / 644169
Issue TrackingMailing ListThird Party Advisory
lists.apache.org / thread.html/c8ebe8aad147a3ad2e7b0e8b2da45263171ab5d0fc7f8c100feaa94d%40%3Cmodperl-cvs.perl.apache.org%3E
lists.debian.org / debian-lts-announce/2018/09/msg00018.html
Mailing ListThird Party Advisory
mail-archives.apache.org / mod_mbox/perl-modperl/201110.mbox/raw/%3C20111004084343.GA21290%40ktnx.net%3E
Mailing ListThird Party Advisory
usn.ubuntu.com / 3825-1
Third Party Advisory
usn.ubuntu.com / 3825-2
Third Party Advisory
securityfocus.com / bid/105195
Third Party AdvisoryVDB Entry