CVE-2013-2777: sudo before 1.7.10p5 and 1.8.x before 1.8.6p6, when the tty_tickets option is enabled, does not properly valid

Q: How do I fix CVE-2013-2777?

mac os x: upgrade to newer than 10.10.4; sudo: upgrade to newer than 1.7.10p4. Exact commands for each OS are on this page.

Q: Is CVE-2013-2777 being exploited?

CVE-2013-2777 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2013-2777 affect?

CVE-2013-2777 affects mac os x, sudo. Severity is medium (CVSS 4.4). sudo before 1.7.10p5 and 1.8.x before 1.8.6p6, when the tty_tickets option is enabled, does not properly validate the controlling terminal device, which allows local users with sudo permissions to hijack the authorization of another termina

Q: How urgent is CVE-2013-2777?

Priority 23/100. No elevated risk signals yet.

Routine

MEDIUM 4.4UPGRADEUPGRADE

CVE-2013-2777 is a medium-severity flaw (CVSS 4.4) affecting mac os x, sudo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

sudo before 1.7.10p5 and 1.8.x before 1.8.6p6, when the tty_tickets option is 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 a session without a controlling terminal device and connecting to the standard input, output, and error file descriptors of another terminal. NOTE: this is one of three closely-related

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.4 (Medium)
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-264
Published	2013-04-08
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: apple · todd miller

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2013-04-08 17:55 UTCPublished CVE record published
2026-06-16 23:53 UTCUpdated Record last modified

apple mac os x UPGRADE

Affected: <= 10.10.4

Fixed in: newer than 10.10.4

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

todd miller sudo UPGRADE

Affected: <= 1.7.10p4 · 1.3.5 · 1.6 · 1.6.1 · 1.6.2 · 1.6.2p3 · 1.6.3 · 1.6.3_p7

Fixed in: newer than 1.7.10p4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy sudo || rpm -q sudo || sudo --version

2. UPGRADE to newer than 1.7.10p4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sudo

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sudo

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2013-2777?

mac os x: upgrade to newer than 10.10.4; sudo: upgrade to newer than 1.7.10p4. Exact commands for each OS are on this page.

Is CVE-2013-2777 being exploited?

CVE-2013-2777 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2013-2777 affect?

CVE-2013-2777 affects mac os x, sudo. Severity is medium (CVSS 4.4). sudo before 1.7.10p5 and 1.8.x before 1.8.6p6, when the tty_tickets option is enabled, does not properly validate the controlling terminal device, which allows local users with sudo permissions to hijack the authorization of another termina

How urgent is CVE-2013-2777?

Priority 23/100. No elevated risk signals yet.

Software pages

Sudo vulnerabilities

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References

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