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CVE-2015-8239

HighPublished

The SHA-2 digest support in the sudoers plugin in sudo after 1.8.7 allows local users with write permissions to parts of the called command to replace them...

Published: Oct 10, 2017
Updated: Aug 6, 2024
Assigning CNA: mitre
Evidence observed: Aug 8, 2026

Primary CVSS

7.0/ 10High

nvd · CVSS 3.0

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

0.6%

Low · next 30 days

Percentile: 44.7%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

The SHA-2 digest support in the sudoers plugin in sudo after 1.8.7 allows local users with write permissions to parts of the called command to replace them before it is executed.

Sources

sudo_digest_toctou_poc_CVE-2015-8239PoC
Docker-based proof-of-concept demonstrating a TOCTOU race condition exploit against sudo's Digest_Spec feature (CVE-2015-8239) using inotify for cross-user file replacement attacks.

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