SB2009091801 - Security restrictions bypass in Linux kernel
Published: September 18, 2009
Security Bulletin ID
SB2009091801
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Security restrictions bypass (CVE-ID: CVE-2009-1883)
The vulnerability allows a local user to read and manipulate data.
The z90crypt_unlocked_ioctl function in the z90crypt driver in the Linux kernel 2.6.9 does not perform a capability check for the Z90QUIESCE operation, which allows local users to leverage euid 0 privileges to force a driver outage.
Remediation
Install update from vendor's website.
References
- http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00007.html
- http://secunia.com/advisories/36759
- http://secunia.com/advisories/37105
- http://www.openwall.com/lists/oss-security/2009/09/15/1
- http://www.openwall.com/lists/oss-security/2009/09/15/3
- http://www.redhat.com/support/errata/RHSA-2009-1438.html
- http://www.ubuntu.com/usn/USN-852-1
- https://bugzilla.redhat.com/show_bug.cgi?id=505983
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9513