An issue was discovered in slicer69 doas before 6.2 on certain platforms other than OpenBSD.

published 2019-10-18 7y ago modified 2026-06-17 4mo ago also EUVD-2019-6810

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.1%; EPSS 2.1% chance of exploitation in 30 days, percentile 81%
public exploits: 0; none known

An issue was discovered in slicer69 doas before 6.2 on certain platforms other than OpenBSD. On platforms without strtonum(3), sscanf was used without checking for error cases. Instead, the uninitialized variable errstr was checked and in some cases returned success even if sscanf failed. The result was that, instead of reporting that the supplied username or group name did not exist, it would execute the command as root.

Patch / fix

fixed in 1 links 1

doas_project doas 6.2

github.com/slicer69/doas@2f83222 commit

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Exploit prediction

2.11% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness

CWE-252 Unchecked Return Value
CWE-754 Improper Check for Unusual or Exceptional Conditions
CWE-863 Incorrect Authorization
CWE-908 Use of Uninitialized Resource

References

github.com /slicer69/doas/commit/2f83222829448e5bc4c9391d607ec265a1e06531
patch
github.com /slicer69/doas/compare/6.1p1...6.2
release-notes

Sources

CVE List CVE-2019-15900
NVD CVE-2019-15900

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