PoC Index

CVE-2019-18684

HIGH 7.0EPSS 0.3%

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. NOTE: This has been disputed due to the way Linux /proc works. It has been argued that writing to /proc/#####/fd/3 would only be viable if you had permission to write to /etc/sudoers. Even with write permission to /proc/#####/fd/3, it would not help you write to /etc/sudoers

CVSS v3.1
7.0 HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0
6.9 MEDIUMAV:L/AC:M/Au:N/C:C/I:C/A:C
EPSS
0.29% chance of exploitation in the next 30 days, 21th percentile
Published
2019-11-04
Updated
2024-08-05

Proof-of-concept exploits (1)

References

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