Vulnerability CVE-2010-2524
Published: 2010-09-08   Modified: 2012-02-13

Description:
The DNS resolution functionality in the CIFS implementation in the Linux kernel before 2.6.35, when CONFIG_CIFS_DFS_UPCALL is enabled, relies on a user's keyring for the dns_resolver upcall in the cifs.upcall userspace helper, which allows local users to spoof the results of DNS queries and perform arbitrary CIFS mounts via vectors involving an add_key call, related to a "cache stuffing" issue and MS-DFS referrals.

See advisories in our WLB2 database:
Topic
Author
Date
Low
linuxkernel 2.6.33 rc4 dns_resolver upcall security issue
Eugene Teo
14.09.2010

Type:

CWE-Other

CVSS2 => (AV:L/AC:M/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.4/10
6.4/10
3.4/10
Exploit range
Attack complexity
Authentication
Local
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Linux -> Kernel 
Linux -> Linux kernel 

 References:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4c0c03ca54f72fdd5912516ad0a23ec5cf01bda7
http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.html
http://marc.info/?l=oss-security&m=128072090331700&w=2
http://marc.info/?l=oss-security&m=128078387328921&w=2
http://marc.info/?l=oss-security&m=128080755321157&w=2
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35
http://www.mandriva.com/security/advisories?name=MDVSA-2010:172
http://www.redhat.com/support/errata/RHSA-2010-0610.html
http://www.securityfocus.com/archive/1/516397/100/0/threaded
http://www.ubuntu.com/usn/USN-1000-1
http://www.vmware.com/security/advisories/VMSA-2011-0003.html
https://bugzilla.redhat.com/show_bug.cgi?id=612166
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