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[sec-adv] HP-UX Shells Insecure Temporary File Creation Vulnerability

From: Secunia Security Advisories (sec-advsecunia.com)
Date: Thu Aug 28 2003 - 10:25:15 CDT

TITLE:
HP-UX Shells Insecure Temporary File Creation Vulnerability

SECUNIA ADVISORY ID:
SA9628

VERIFY ADVISORY:
http://www.secunia.com/advisories/9628/

CRITICAL:
Less critical

IMPACT:
Manipulation of data, Privilege escalation, DoS

WHERE:
Local system

OPERATING SYSTEM:
HP-UX 11.x
HP-UX 10.x

DESCRIPTION:
HP has confirmed an older vulnerability in HP-UX, which can be
exploited by malicious, local users to corrupt the filesystem, cause
a DoS (Denial of Service) or escalate their privileges.

The vulnerability is caused due to some shells creating temporary
files insecurely with names based on a process id when using the "<<"
redirection operator. This can be exploited by either manipulating
the temporary files or via symlink attacks.

The vulnerability affects HP9000 servers running HP-UX versions
B.10.20, B.11.00, or B.11.11.

SOLUTION:
Apply patches.

HP-UX B.11.11:
PHCO_27345 (sh-posix)
PHCO_27019 (ksh)
PHCO_26561 (csh)

HP-UX B.11.00:
PHCO_27344 (sh-posix)
PHCO_27418 (ksh)
PHCO_27763 (csh)

HP-UX B.10.20:
PHCO_27804 (sh-posix)
PHCO_27803 (ksh)
PHCO_27819 (csh)

REPORTED BY / CREDITS:
Gordon Irlam

ORIGINAL ADVISORY:
http://www4.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBUX0308-275

OTHER REFERENCES:
http://www.kb.cert.org/vuls/id/10277

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