CVE-2010-2524
HIGH severity · CVSS 7.8
7.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: http://marc.info/?l=oss-security&m=128072090331700&w=2 ↗
Additional information
- NVD record
- http://marc.info/?l=oss-security&m=128072090331700&w=2Patch
- http://marc.info/?l=oss-security&m=128078387328921&w=2Patch
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=4c0c03ca54f72fdd5912516ad0a23ec5cf01bda7
- http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.htmlAdvisory
- http://marc.info/?l=oss-security&m=128080755321157&w=2Advisory
- 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