Vulnerability Database

383,304

Total vulnerabilities in the database

CVE-2013-2776 — todd_miller / sudo

Permissions, Privileges, and Access Controls

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.

  • Published: Apr 8, 2013
  • Updated: Sep 13, 2026
  • CVE: CVE-2013-2776
  • Severity: Medium
  • Exploit:
  • CISA KEV:

CVSS v2:

  • Severity: Medium
  • Score: 4.4
  • AV:L/AC:M/Au:N/C:P/I:P/A:P

CWEs:

Software Affected versions
todd_miller / sudo = 1.3.5
todd_miller / sudo = 1.6
todd_miller / sudo = 1.6.1
todd_miller / sudo = 1.6.2
todd_miller / sudo = 1.6.2p3
todd_miller / sudo = 1.6.3
todd_miller / sudo = 1.6.3_p7
todd_miller / sudo = 1.6.4
todd_miller / sudo = 1.6.4p2
todd_miller / sudo = 1.6.5
todd_miller / sudo = 1.6.6
todd_miller / sudo = 1.6.7
todd_miller / sudo = 1.6.7p5
todd_miller / sudo = 1.6.8
todd_miller / sudo = 1.6.8p12
todd_miller / sudo = 1.6.9
todd_miller / sudo = 1.6.9p20
todd_miller / sudo = 1.6.9p21
todd_miller / sudo = 1.6.9p22
todd_miller / sudo = 1.6.9p23
todd_miller / sudo = 1.7.0
todd_miller / sudo = 1.7.1
todd_miller / sudo = 1.7.2
todd_miller / sudo = 1.7.2p1
todd_miller / sudo = 1.7.2p2
todd_miller / sudo = 1.7.2p3
todd_miller / sudo = 1.7.2p4
todd_miller / sudo = 1.7.2p5
todd_miller / sudo = 1.7.2p6
todd_miller / sudo = 1.7.2p7
todd_miller / sudo = 1.7.3b1
todd_miller / sudo = 1.7.4
todd_miller / sudo = 1.7.4p1
todd_miller / sudo = 1.7.4p2
todd_miller / sudo = 1.7.4p3
todd_miller / sudo = 1.7.4p4
todd_miller / sudo = 1.7.4p5
todd_miller / sudo = 1.7.4p6
todd_miller / sudo = 1.7.5
todd_miller / sudo = 1.7.6
todd_miller / sudo = 1.7.6p1
todd_miller / sudo = 1.7.6p2
todd_miller / sudo = 1.7.7
todd_miller / sudo = 1.7.8
todd_miller / sudo = 1.7.8p1
todd_miller / sudo = 1.7.8p2
todd_miller / sudo = 1.7.9
todd_miller / sudo = 1.7.9p1
todd_miller / sudo = 1.7.10
apple / mac_os_x <= 10.10.4
todd_miller / sudo = 1.8.0
todd_miller / sudo = 1.8.1
todd_miller / sudo = 1.8.1p1
todd_miller / sudo = 1.8.1p2
todd_miller / sudo = 1.8.2
todd_miller / sudo = 1.8.3
todd_miller / sudo = 1.8.3p1
todd_miller / sudo = 1.8.3p2
todd_miller / sudo = 1.8.4
todd_miller / sudo = 1.8.4p1
todd_miller / sudo = 1.8.4p2
todd_miller / sudo = 1.8.4p3
todd_miller / sudo = 1.8.4p4
todd_miller / sudo = 1.8.4p5
todd_miller / sudo = 1.8.5

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.