Null pointer dereference in Linux kernel



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2006-7203
CWE-ID CWE-476
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Null pointer dereference

EUVDB-ID: #VU95257

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 - NULL Pointer Dereference

Exploit availability: No

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

CPE2.3 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.



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