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AUSCERT External Security Bulletin Redistribution
doas: Prevent passing of environment variables
12 August 2019
AusCERT Security Bulletin Summary
Operating System: FreeBSD
Impact/Access: Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
Comment: This advisory references vulnerabilities in products which run on
platforms other than FreeBSD. It is recommended that administrators
running doas check for an updated version of the software for their
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FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports
doas -- Prevent passing of environment variables
doas < 6.1
VuXML ID 7f7d6412-bae5-11e9-be92-3085a9a95629
Jesse Smith of Resonating Media reports:
Previous versions of "doas" transferred most environment variables, such as
USER, HOME, and PATH from the original user to the target user. Passing
these variables could cause files in the wrong path or home directory to be
read (or written to), which resulted in potential security problems.
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