[SA19323] RunIt "chpst" Multiple Groups Handling Security Issue

TITLE:
RunIt "chpst" Multiple Groups Handling Security Issue

SECUNIA ADVISORY ID:
SA19323

VERIFY ADVISORY:
http://secunia.com/advisories/19323/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

SOFTWARE:
runit 1.x
http://secunia.com/product/8850/

DESCRIPTION:
Tino Keitel has reported a security issue in RunIt, which potentially
can cause a process to run with escalated group privileges.

The security issue is caused due to an integer type definition error
in "uidgid.h". This can cause the group permissions of a process to
be incorrect changed to the "root" group when "chpst" is used to set
the permissions of a process using the "-u" option with multiple
group names.

Successful exploitation requires that "chpst" is compiled against the
dietlibc library.

The security issue has been reported in version 1.3.3 and affects
only the x86 platform. Other versions may also be affected.

SOLUTION:
Update to version 1.4.1.
http://smarden.org/runit/install.html

PROVIDED AND/OR DISCOVERED BY:
Tino Keite

ORIGINAL ADVISORY:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=356016

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