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.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- 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.htmlMailing List, Third Party Advisory
- http://marc.info/?l=oss-security&m=128072090331700&w=2Mailing List, Patch, Third Party Advisory
- http://marc.info/?l=oss-security&m=128078387328921&w=2Mailing List, Patch, Third Party Advisory
- http://marc.info/?l=oss-security&m=128080755321157&w=2Mailing List, Third Party Advisory
- http://secunia.com/advisories/43315Broken Link
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35Broken Link
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:172Broken Link
- http://www.redhat.com/support/errata/RHSA-2010-0610.htmlBroken Link
- http://www.securityfocus.com/archive/1/516397/100/0/threadedThird Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-1000-1Third Party Advisory
- http://www.vmware.com/security/advisories/VMSA-2011-0003.htmlPatch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=612166Issue Tracking, Patch, Third Party Advisory
- 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.htmlMailing List, Third Party Advisory
- http://marc.info/?l=oss-security&m=128072090331700&w=2Mailing List, Patch, Third Party Advisory
- http://marc.info/?l=oss-security&m=128078387328921&w=2Mailing List, Patch, Third Party Advisory
- http://marc.info/?l=oss-security&m=128080755321157&w=2Mailing List, Third Party Advisory
- http://secunia.com/advisories/43315Broken Link
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35Broken Link
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:172Broken Link
- http://www.redhat.com/support/errata/RHSA-2010-0610.htmlBroken Link
- http://www.securityfocus.com/archive/1/516397/100/0/threadedThird Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-1000-1Third Party Advisory
- http://www.vmware.com/security/advisories/VMSA-2011-0003.htmlPatch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=612166Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Sep 8, 2010
- Last modified
- Jun 16, 2026
- NVD status
- Modified