#VU95257 Null pointer dereference in Linux kernel - CVE-2006-7203
Vulnerability identifier: #VU95257
Vulnerability risk: Low
CVSSv4.0: 1.9 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2006-7203
CWE-ID:
CWE-476
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The compat_sys_mount function in fs/compat.c in Linux kernel 2.6.20 and earlier allows local users to cause a denial of service (NULL pointer dereference and oops) by mounting a smbfs file system in compatibility mode ('mount -t smbfs').
Mitigation
Install update from vendor's repository.
Vulnerable software versions
Linux kernel: All versions
External links
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff_plain;h=822191a2fa1584a29c3224ab328507adcaeac1ab
https://rhn.redhat.com/errata/RHSA-2007-0488.html
https://secunia.com/advisories/25682
https://secunia.com/advisories/25683
https://secunia.com/advisories/25700
https://secunia.com/advisories/25838
https://secunia.com/advisories/25961
https://secunia.com/advisories/26133
https://secunia.com/advisories/26139
https://secunia.com/advisories/26289
https://secunia.com/advisories/26620
https://secunia.com/advisories/29058
https://support.avaya.com/elmodocs2/security/ASA-2007-287.htm
https://www.debian.org/security/2008/dsa-1504
https://www.mandriva.com/security/advisories?name=MDKSA-2007:171
https://www.mandriva.com/security/advisories?name=MDKSA-2007:196
https://www.novell.com/linux/security/advisories/2007_35_kernel.html
https://www.novell.com/linux/security/advisories/2007_43_kernel.html
https://www.ubuntu.com/usn/usn-486-1
https://www.ubuntu.com/usn/usn-489-1
https://www.vupen.com/english/advisories/2007/2209
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10941
https://rhn.redhat.com/errata/RHSA-2007-0376.html
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
