CVE-2010-2524
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.42%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.42% probability · 36th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel · vmware/esx · canonical/ubuntu linux · suse/suse linux enterprise desktop · suse/suse linux enterprise server
- Source
- secalert@redhat.com
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.