Vulnerability Details : CVE-2015-8970
crypto/algif_skcipher.c in the Linux kernel before 4.4.2 does not verify that a setkey operation has been performed on an AF_ALG socket before an accept system call is processed, which allows local users to cause a denial of service (NULL pointer dereference and system crash) via a crafted application that does not supply a key, related to the lrw_crypt function in crypto/lrw.c.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2015-8970
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2015-8970
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2015-8970
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2015-8970
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: nvd@nist.gov (Primary)
References for CVE-2015-8970
-
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dd504589577d8e8e70f51f997ad487a4cb6c026f
kernel/git/torvalds/linux.git - Linux kernel source treeIssue Tracking;Patch;Vendor Advisory
-
https://groups.google.com/forum/#%21msg/syzkaller/frb2XrB5aWk/xCXzkIBcDAAJ
Sign in - Google Accounts
-
http://www.openwall.com/lists/oss-security/2016/11/04/3
oss-security - Re: CVE request -- linux kernel: crypto: GPF in lrw_crypt caused by null-derefMailing List;Third Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=1386286
1386286 – (CVE-2015-8970) CVE-2015-8970 kernel: crypto: GPF in lrw_crypt caused by null-derefIssue Tracking
-
https://access.redhat.com/errata/RHSA-2017:2444
RHSA-2017:2444 - Security Advisory - Red Hat Customer Portal
-
https://access.redhat.com/errata/RHSA-2017:1842
RHSA-2017:1842 - Security Advisory - Red Hat Customer Portal
-
https://access.redhat.com/errata/RHSA-2017:2077
RHSA-2017:2077 - Security Advisory - Red Hat Customer Portal
-
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.2
Release Notes
-
https://access.redhat.com/errata/RHSA-2017:2437
RHSA-2017:2437 - Security Advisory - Red Hat Customer Portal
-
http://www.securityfocus.com/bid/94217
Linux Kernel 'crypto/lrw.c' Local Denial of Service VulnerabilityThird Party Advisory;VDB Entry
-
https://github.com/torvalds/linux/commit/dd504589577d8e8e70f51f997ad487a4cb6c026f
crypto: algif_skcipher - Require setkey before accept(2) · torvalds/linux@dd50458 · GitHubIssue Tracking;Patch;Third Party Advisory
Jump to