CVE-2020-16127

accountsservice .pam_environment infinite loop

State: Published
Severity: 2.8 Low
Published: Nov 11, 2020
Updated: Sep 16, 2024
Reserved: Jul 29, 2020

Description

An Ubuntu-specific modification to AccountsService in versions before 0.6.55-0ubuntu13.2, among other earlier versions, would perform unbounded read operations on user-controlled ~/.pam_environment files, allowing an infinite loop if /dev/zero is symlinked to this location.

Scores

CVSS	Score	Vector	Source
3.1	2.8 Low	CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L	canonical

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
accountsserviceFreedesktop	0.6.35-0ubuntu7.3 to before 0.6.35-0ubuntu7.3+esm2Affected 0.6.40-2ubuntu11 to before 0.6.40-2ubuntu11.6Affected 0.6.45-1ubuntu1 to before 0.6.45-1ubuntu1.3Affected 0.6.55-0ubuntu to before 0.6.55-0ubuntu12~20.04.4Affected 0.6.55-0ubuntu13 to before 0.6.55-0ubuntu13.2Affected

References

https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS

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