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CVE-2013-4136

14
FAUCET Score

CVE-2013-4136 describes a local privilege escalation vulnerability in Phusion Passenger gem versions prior to 4.0.6 for Ruby. An attacker could exploit a symlink attack on predictably named directories in /tmp/ to gain privileges or alter directory ownership. With a CVSS score of 4.4, this vulnerability has a low attack complexity and requires local access, potentially leading to partial confidentiality, integrity, and availability impacts. There is no known active exploitation, public exploit code, or Metasploit/Nuclei modules available, and it has received minimal community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.0.5CPE matchmatch criteria
cpe:2.3:a:phusion:passenger:*:*:*:*:*:*:*:*
4.0.1CPE matchmatch criteria
cpe:2.3:a:phusion:passenger:4.0.1:*:*:*:*:*:*:*
4.0.2CPE matchmatch criteria
cpe:2.3:a:phusion:passenger:4.0.2:*:*:*:*:*:*:*
4.0.3CPE matchmatch criteria
cpe:2.3:a:phusion:passenger:4.0.3:*:*:*:*:*:*:*
4.0.4CPE matchmatch criteria
cpe:2.3:a:phusion:passenger:4.0.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.4MEDIUM

AV:L/AC:M/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
3.4
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.33%
Probability of exploitation in next 30 days
EPSS Percentile
25.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0033 is in the 25th percentile among its peer group of 1,595 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (5)

redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift Enterprise 1.2Fixed in: ruby193-rubygem-passenger-0:3.0.21-3.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift Enterprise 1.2Fixed in: rubygem-file-tail-0:1.0.5-4.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift Enterprise 1.2Fixed in: rubygem-passenger-0:3.0.21-3.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift Enterprise 1.2Fixed in: rubygem-spruz-0:0.2.5-4.el6op
View patch
rubygemspatch availablevia ghsa
Product: passengerFixed in: 4.0.6

Vendor Advisories (2)

rubygemsGHSA-w6rc-q387-vpgqmedium

insecure temporary directory usage in passenger

Oct 24, 2017
redhatCVE-2013-4136Moderate

rubygem-passenger: insecure temporary directory usage due to reuse of existing server instance directories

Jun 20, 2013

References

rhn.redhat.com / errata/RHSA-2013-1136.html
Vendor Advisory
code.google.com / p/phusion-passenger/issues/detail
github.com / phusion/passenger/blob/release-4.0.6/NEWS
github.com / phusion/passenger/commit/5483b3292cc2af1c83033eaaadec20dba4dcfd9b
openwall.com / lists/oss-security/2013/07/16/6