CVE-2005-4783
First published: Sat Dec 31 2005(Updated: )
kernfs_xread in kernfs_vnops.c in NetBSD before 20050831 does not check for a negative offset when reading the message buffer, which allows local users to read arbitrary kernel memory.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| NetBSD current | =1.6 | |
| NetBSD current | =2.0 | |
| NetBSD current | =2.0.3 | |
| NetBSD current | =2.1 |
Remedy
http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/miscfs/kernfs/kernfs_vnops.c.diff?r1=1.110&r2=1.111&f=h
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Reference Links
- http://mail-index.netbsd.org/netbsd-announce/2005/10/31/0000.html
- http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/miscfs/kernfs/kernfs_vnops.c
- http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/miscfs/kernfs/kernfs_vnops.c.diff?r1=1.110&r2=1.111&f=h
- http://releng.netbsd.org/cgi-bin/req-3.cgi?show=727
- http://www.packetstormsecurity.org/0601-advisories/NetBSD-SA2006-001.txt
- http://www.osvdb.org/20729
- http://securitytracker.com/id?1015132
Frequently Asked Questions
What is the severity of CVE-2005-4783?
CVE-2005-4783 is considered a local privilege escalation vulnerability that allows users to access arbitrary kernel memory.
How do I fix CVE-2005-4783?
To fix CVE-2005-4783, update NetBSD to a version released after 20050831 where the issue has been addressed.
Who is affected by CVE-2005-4783?
CVE-2005-4783 affects local users on NetBSD versions 1.6, 2.0, 2.0.3, and 2.1.
What types of attacks can CVE-2005-4783 facilitate?
CVE-2005-4783 can facilitate local attacks that enable unauthorized access to sensitive kernel memory.
Is CVE-2005-4783 still relevant today?
While CVE-2005-4783 is an older vulnerability, it remains relevant for systems running affected versions of NetBSD that have not been updated.
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