HOMEVULNERABILITIESCVE-2013-2776
MEDIUM

CVE-2013-2776

CWE-264Published: April 8, 2013· Updated: Jun 16, 2026

4.4
CVSS v3.1

Official Description

sudo 1.3.5 through 1.7.10p5 and 1.8.0 through 1.8.6p6, when running on systems without /proc or the sysctl function with the tty_tickets option enabled, does not properly validate the controlling terminal device, which allows local users with sudo permissions to hijack the authorization of another terminal via vectors related to connecting to the standard input, output, and error file descriptors of another terminal. NOTE: this is one of three closely-related vulnerabilities that were originally assigned CVE-2013-1776, but they have been SPLIT because of different affected versions.

NVD Source

Technical Analysis

CVE-2013-2776 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityM
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityP
IntegrityP
AvailabilityP
AV:L/AC:M/Au:N/C:P/I:P/A:P

Affected Vendors & Products

Apple1 product(s)
mac os x
todd_miller1 product(s)
sudo
Source: NVD CPE · 76 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://www.sudo.ws/repos/sudo/rev/049a12a5cc14
ADVISORYhttp://www.sudo.ws/repos/sudo/rev/0c0283d1fafa
ADVISORYhttps://support.apple.com/kb/HT205031
ADVISORYhttp://www.sudo.ws/repos/sudo/rev/049a12a5cc14
ADVISORYhttp://www.sudo.ws/repos/sudo/rev/0c0283d1fafa
ADVISORYhttps://support.apple.com/kb/HT205031

All References (34)

→
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=701839
→
http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html
→
http://rhn.redhat.com/errata/RHSA-2013-1353.html
→
http://rhn.redhat.com/errata/RHSA-2013-1701.html
→
http://www.debian.org/security/2013/dsa-2642
→
http://www.openwall.com/lists/oss-security/2013/02/27/31
→
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
→
http://www.securityfocus.com/bid/58207
→
http://www.securityfocus.com/bid/62741
→
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2013&m=slackware-security.517440
→
http://www.sudo.ws/repos/sudo/rev/049a12a5cc14Vendor Advisory
→
http://www.sudo.ws/repos/sudo/rev/0c0283d1fafaVendor Advisory
→
http://www.sudo.ws/sudo/alerts/tty_tickets.html
→
https://bugs.launchpad.net/ubuntu/+source/sudo/+bug/87023
→
https://bugzilla.redhat.com/show_bug.cgi?id=916365

Quick Facts

CVE IDCVE-2013-2776
CVSS Score4.4 / 10
SeverityMEDIUM
WeaknessCWE-264
CISA KEVNo
Affected2 vendor(s)
PublishedApr 8, 2013

Related CVEs (CWE-264)

CVE-2008-7115
10.0
CVE-2008-1242
10.0
CVE-2005-0735
10.0
CVE-2002-0013
10.0
CVE-2014-9583
10.0
CVE-2011-5010
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2013-2776 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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