SGI LOCKOUT function allows file creation and corruption
| sgi-lockout (557) |  Medium Risk |
Description:
The LOCKOUT functionality of the IRIX login(1) program contains a vulnerability that allows files to be created or corrupted if the value of the LOCKOUT variable is greater than zero.
Platforms Affected:
- SGI, IRIX 5.0
- SGI, IRIX 5.0.1
- SGI, IRIX 5.1
- SGI, IRIX 5.1.1
- SGI, IRIX 5.2
- SGI, IRIX 5.3
- SGI, IRIX 5.3 XFS
- SGI, IRIX 6.0
- SGI, IRIX 6.0.1
- SGI, IRIX 6.1
- SGI, IRIX 6.2
- SGI, IRIX 6.3
- SGI, IRIX 6.4
Remedy:
Disable the LOCKOUT functionality by placing a '#' character in front of the line beginning with "LOCKOUT" in the '/etc/default/login' file.
— AND —
Apply the appropriate patch for your system, as listed in SGI Security Advisory, September 15, 1997. See References.
If you are running another version of IRIX it is suggested you upgrade to a supported version and then apply the patches listed in the SGI Security Advisory.
Consequences:
File Manipulation
References:
- AusCERT Advisory AA-97.12, SGI IRIX login LOCKOUT parameter Vulnerability at ftp://ftp.auscert.org.au/pub/auscert/advisory/AA-97.12.sgi.login-lockout.vulnerability.
- CERT Advisory CA-1997-15, Vulnerability in SGI login LOCKOUT at http://www.cert.org/advisories/CA-1997-15.html.
- CIAC Information Bulletin H-106, SGI IRIX LOCKOUT & login/scheme Vulnerabilities at http://ciac.llnl.gov/ciac/bulletins/h-106.shtml.
- SGI Security Advisory 19970508-02-PX, IRIX LOCKOUT and login/scheme Buffer Overrun at ftp://patches.sgi.com/support/free/security/advisories/19970508-02-PX.
- BID-392: IRIX login Vulnerability
- CVE-1999-0036: IRIX login program with a nonzero LOCKOUT parameter allows creation or damage to files.
- OSVDB ID: 990: IRIX login Non-zero LOCKOUT Arbitrary File Modification
Reported:
Sep 01, 1997
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