RCE in Apache Mod Perl
CVE-2011-2767
mod_perl 2.0 through 2.0.10 allows attackers to execute arbitrary Perl code by placing it in a user-owned .htaccess file, because (contrary to the documentation) there is no configuration option that permits Perl code for the administrator's control of HTTP request processing without also permitting unprivileged users to run Perl code in the context of the user account that runs Apache HTTP Server processes.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.089 (95.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.089 · newest: 0.089 · change: 0.000
Affected products
- Apache Mod Perl
- Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
- Debian Linux — versions 8.0
- Red Hat Enterprise Linux — versions 6.0, 6.7, 7.0
- Red Hat Enterprise Linux Desktop — versions 6.0
- Red Hat Enterprise Linux Server — versions 6.0
- Red Hat Enterprise Linux Workstation — versions 6.0
- Mod Perl 2.0 Through 2.0.10 — versions mod_perl 2.0 through 2.0.10
Weakness classification (CWE)
References
- lists.debian.org/debian-lts-announce/2018/09/msg00018.html (mailing-list, Mailing List, Third Party Advisory)
- www.securityfocus.com/bid/105195 (VDB Entry, Third Party Advisory, vdb-entry)
- usn.ubuntu.com/3825-1/ (vendor-advisory, Third Party Advisory)
- bugs.debian.org/644169 (Mailing List, Third Party Advisory, Issue Tracking)
- access.redhat.com/errata/RHSA-2018:2826 (vendor-advisory, Third Party Advisory)
- mail-archives.apache.org/mod_mbox/perl-modperl/201110.mbox/raw/<20111004084343… (Mailing List, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:2825 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:2737 (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3825-2/ (vendor-advisory, Third Party Advisory)
- lists.apache.org/thread.html/c8ebe8aad147a3ad2e7b0e8b2da45263171ab5d0fc7f8c100f… (mailing-list)
Frequently asked questions
- What is CVE-2011-2767?
- CVE-2011-2767 is a critical-severity vulnerability in Apache Mod Perl, classified under Code Injection. CVSS score: 9.8/10. Published 2018-08-26.
- How severe is CVE-2011-2767?
- Critical severity. CVSS v3 base score is 9.8 out of 10.