CVE-2010-2524

MEDIUM

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.

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://secunia.com/advisories/43315

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

Details

Source: MITRE

Published: 2010-09-08

Updated: 2018-10-10

Risk Information

CVSS v2.0

Base Score: 4.4

Vector: AV:L/AC:M/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 3.4

Severity: MEDIUM