Race Condition

Affecting sudo package, versions *

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Overview

Sudo through 1.8.29 allows local users to escalate to root if they have write access to file descriptor 3 of the sudo process. This occurs because of a race condition between determining a uid, and the setresuid and openat system calls. The attacker can write "ALL ALL=(ALL) NOPASSWD:ALL" to /proc/#####/fd/3 at a time when Sudo is prompting for a password.

References

CVSS Score

7.0
high severity
  • Attack Vector
    Local
  • Attack Complexity
    High
  • Privileges Required
    Low
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    High
  • Integrity
    High
  • Availability
    High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVE
CVE-2019-18684
CWE
CWE-362
Snyk ID
SNYK-DEBIAN9-SUDO-482319
Disclosed
04 Nov, 2019
Published
10 Nov, 2019