5454 : TCP Wrappers PARANOID Reverse DNS ACL Bypass
Printer | http://osvdb.org/5454 | Email This | Edit Vulnerability

Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
8	1171	about 9 years ago	about 5 years ago	0 times	90%

Timeline

Disclosure Date
2001-07-04

Description

FreeBSD's distribution of tcp_wrappers contains a flaw that may allow a malicious user access to restricted network resources. The issue is triggered when a flawed check for a numeric result during reverse DNS lookup occurs. It is possible that the flaw may allow bypass of tcp_wrappers 'PARANOID' ACL restrictions.

Classification

Location: Remote / Network Access
Attack Type: Infrastructure
Impact: Loss of Integrity
Exploit: Exploit Unknown

Solution

Upgrade to 4.3 -STABLE or the RELENG_4_3 security branch released after the correction dates or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

For versions 4.2 -RELEASE, 4.3 -RELEASE and 4.3 -STABLE released before the correction date, FreeBSD has released a patch to address this vulnerability.

Products

The FreeBSD Project	FreeBSD	4.1.1-RELEASE
		4.2 -RELEASE
		4.3 -RELEASE
		4.3 -STABLE

References

Keyword: 1002271 2001-1155 3229 FreeBSD-SA-01:56
Security Tracker: 1002271
CVE ID: 2001-1155 (see also: NVD)
Bugtraq ID: 3229
Vendor Specific Advisory URL: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:56.tcp_wrappers.asc
Vendor Specific Solution URL: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/patches/SA-01:56/tcp_wrappers.patch ftp://ftp.freebsd.org/pub/FreeBSD/CERT/patches/SA-01:56/tcp_wrappers.patch.asc
Vendor URL: http://www.freebsd.org

Credit

Tony Finch - dotdotat.at -

CVSSv2 Score

CVSSv2 Base Score = 7.5
Source: nvd.nist.gov | Generated: 2003-12-31 | Disagree?

Comments

Add Comment Hide Add Comment

No Comments.

The database information may change without any notice. Use of the information constitutes acceptance for use in an AS IS condition, and there are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the copyright holder or distributor (OSVDB or OSF) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.