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AUSCERT External Security Bulletin Redistribution
25 October 2019
AusCERT Security Bulletin Summary
Operating System: FreeBSD
Impact/Access: Root Compromise -- Existing Account
CVE Names: CVE-2019-14287
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FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports
sudo -- Potential bypass of Runas user restrictions
sudo < 1.8.28
VuXML ID 3a1474ba-f646-11e9-b0af-b888e347c638
Todd C. Miller reports:
When sudo is configured to allow a user to run commands as an arbitrary
user via the ALL keyword in a Runas specification, it is possible to run
commands as root by specifying the user ID -1 or 4294967295.
This can be used by a user with sufficient sudo privileges to run commands
as root even if the Runas specification explicitly disallows root access as
long as the ALL keyword is listed first in the Runas specification.
Log entries for commands run this way will list the target user as
4294967295 instead of root. In addition, PAM session modules will not be
run for the command.
CVE Name CVE-2019-14287
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