SB2013060803 - NULL pointer dereference in Linux kernel

Description

This security bulletin contains information about 1 security vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2011-3619)

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 security/apparmor/lsm.c in the Linux kernel before 3.0 does not properly handle invalid parameters, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) or possibly have unspecified other impact by writing to a /proc/#####/attr/current file. A remote attacker can perform a denial of service (DoS) attack.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• http://ftp.osuosl.org/pub/linux/kernel/v3.0/ChangeLog-3.0
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a5b2c5b2ad5853591a6cac6134cd0f599a720865
• http://www.openwall.com/lists/oss-security/2011/10/17/6
• https://github.com/torvalds/linux/commit/a5b2c5b2ad5853591a6cac6134cd0f599a720865