NULL pointer dereference in Linux kernel



| Updated: 2020-08-10
Risk Medium
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2013-6431
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 medium risk vulnerability.

1) NULL pointer dereference

EUVDB-ID: #VU42243

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2013-6431

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in net/ipv6/ip6_fib.c in the Linux kernel before 3.11.5 does not properly implement error-code encoding, which allows local users to cause a denial of service (NULL pointer dereference and system crash) by leveraging the CAP_NET_ADMIN capability for an IPv6 SIOCADDRT ioctl call. A remote attacker can perform a denial of service (DoS) attack.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Linux kernel: 3.0 - 3.11.3

CPE2.3 External links

https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ae7b4e1f213aa659aedf9c6ecad0bf5f0476e1e2
https://lists.opensuse.org/opensuse-security-announce/2014-02/msg00002.html
https://rhn.redhat.com/errata/RHSA-2014-0100.html
https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.11.5
https://www.openwall.com/lists/oss-security/2013/12/06/5
https://bugzilla.redhat.com/show_bug.cgi?id=1039054
https://github.com/torvalds/linux/commit/ae7b4e1f213aa659aedf9c6ecad0bf5f0476e1e2


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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