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CVE-2013-2776

14
FAUCET Score

CVE-2013-2776 describes a local privilege escalation vulnerability in sudo versions 1.3.5 through 1.7.10p5 and 1.8.0 through 1.8.6p6, affecting systems without /proc or sysctl when the tty_tickets option is enabled. This flaw allows local users with sudo permissions to hijack authorization from another terminal by manipulating standard I/O file descriptors. With a CVSS score of 4.4 (AV:L/AC:M/Au:N/C:P/I:P/A:P), it indicates a low-severity vulnerability requiring local access and medium attack complexity, potentially leading to partial confidentiality, integrity, and availability impacts. 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
1.3.5CPE matchmatch criteria
cpe:2.3:a:todd_miller:sudo:1.3.5:*:*:*:*:*:*:*
1.6CPE matchmatch criteria
cpe:2.3:a:todd_miller:sudo:1.6:*:*:*:*:*:*:*
1.6.1CPE matchmatch criteria
cpe:2.3:a:todd_miller:sudo:1.6.1:*:*:*:*:*:*:*
1.6.2CPE matchmatch criteria
cpe:2.3:a:todd_miller:sudo:1.6.2:*:*:*:*:*:*:*
1.6.2p3CPE matchmatch criteria
cpe:2.3:a:todd_miller:sudo:1.6.2p3:*:*:*:*:*:*:*

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
0.37%
Probability of exploitation in next 30 days
EPSS Percentile
29.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0037 is in the 44th 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 (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: sudo-0:1.7.2p1-28.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: sudo-0:1.8.6p3-12.el6
View patch
applevendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2013-2776Low

sudo: bypass of tty_tickets constraints

Feb 27, 2013

References

bugs.debian.org / cgi-bin/bugreport.cgi
lists.apple.com / archives/security-announce/2015/Aug/msg00001.html
rhn.redhat.com / errata/RHSA-2013-1353.html
rhn.redhat.com / errata/RHSA-2013-1701.html
bugs.launchpad.net / ubuntu/+source/sudo/+bug/87023
bugzilla.redhat.com / show_bug.cgi
exchange.xforce.ibmcloud.com / vulnerabilities/82453
support.apple.com / kb/HT205031
Vendor Advisory
debian.org / security/2013/dsa-2642
openwall.com / lists/oss-security/2013/02/27/31
oracle.com / technetwork/topics/security/ovmbulletinjul2016-3090546.html
securityfocus.com / bid/58207
securityfocus.com / bid/62741
slackware.com / security/viewer.php
sudo.ws / repos/sudo/rev/049a12a5cc14
Vendor Advisory
sudo.ws / repos/sudo/rev/0c0283d1fafa
Vendor Advisory
sudo.ws / sudo/alerts/tty_tickets.html