CVE-2015-8970
Linux AF_ALG Socket Setkey Accept Denial of Service Vulnerability
Description
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.
INFO
Published Date :
Nov. 28, 2016, 3:59 a.m.
Last Modified :
Feb. 13, 2023, 12:55 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
Public PoC/Exploit Available at Github
CVE-2015-8970 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2015-8970.
| URL | Resource |
|---|---|
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dd504589577d8e8e70f51f997ad487a4cb6c026f | Issue Tracking Patch Vendor Advisory |
| http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.2 | Release Notes |
| http://www.openwall.com/lists/oss-security/2016/11/04/3 | Mailing List Third Party Advisory |
| http://www.securityfocus.com/bid/94217 | Third Party Advisory VDB Entry |
| https://access.redhat.com/errata/RHSA-2017:1842 | |
| https://access.redhat.com/errata/RHSA-2017:2077 | |
| https://access.redhat.com/errata/RHSA-2017:2437 | |
| https://access.redhat.com/errata/RHSA-2017:2444 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1386286 | Issue Tracking |
| https://github.com/torvalds/linux/commit/dd504589577d8e8e70f51f997ad487a4cb6c026f | Issue Tracking Patch Third Party Advisory |
| https://groups.google.com/forum/#%21msg/syzkaller/frb2XrB5aWk/xCXzkIBcDAAJ |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2015-8970 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2015-8970 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Feb. 13, 2023
Action Type Old Value New Value Changed Description The lrw_crypt() function in 'crypto/lrw.c' in the Linux kernel before 4.5 allows local users to cause a system crash and a denial of service by the NULL pointer dereference via accept(2) system call for AF_ALG socket without calling setkey() first to set a cipher key. 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. Removed CVSS V2 Red Hat, Inc. (AV:L/AC:L/Au:N/C:N/I:N/A:C) Removed CVSS V3 Red Hat, Inc. AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Removed Reference https://access.redhat.com/security/cve/CVE-2015-8970 [No Types Assigned] -
CVE Modified by [email protected]
Feb. 02, 2023
Action Type Old Value New Value Changed Description 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. The lrw_crypt() function in 'crypto/lrw.c' in the Linux kernel before 4.5 allows local users to cause a system crash and a denial of service by the NULL pointer dereference via accept(2) system call for AF_ALG socket without calling setkey() first to set a cipher key. Added CVSS V2 Red Hat, Inc. (AV:L/AC:L/Au:N/C:N/I:N/A:C) Added CVSS V3 Red Hat, Inc. AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Removed Reference https://groups.google.com/forum/#!msg/syzkaller/frb2XrB5aWk/xCXzkIBcDAAJ [No Types Assigned] Added Reference https://groups.google.com/forum/#%21msg/syzkaller/frb2XrB5aWk/xCXzkIBcDAAJ [No Types Assigned] Added Reference https://access.redhat.com/security/cve/CVE-2015-8970 [No Types Assigned] -
CVE Modified by [email protected]
Aug. 13, 2018
Action Type Old Value New Value Removed Reference https://groups.google.com/forum/#%21msg/syzkaller/frb2XrB5aWk/xCXzkIBcDAAJ [Third Party Advisory] Added Reference https://groups.google.com/forum/#!msg/syzkaller/frb2XrB5aWk/xCXzkIBcDAAJ [No Types Assigned] -
CVE Modified by [email protected]
Jan. 05, 2018
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2017:2444 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2017:2437 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2017:2077 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2017:1842 [No Types Assigned] -
Initial Analysis by [email protected]
Nov. 29, 2016
Action Type Old Value New Value Added CPE Configuration Configuration 1 OR *cpe:2.3:o:linux:linux_kernel:4.4.1:*:*:*:*:*:*:* (and previous) Added CVSS V2 (AV:L/AC:L/Au:N/C:N/I:N/A:C) Added CVSS V3 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.2 No Types Assigned http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.2 Release Notes Changed Reference Type https://github.com/torvalds/linux/commit/dd504589577d8e8e70f51f997ad487a4cb6c026f No Types Assigned https://github.com/torvalds/linux/commit/dd504589577d8e8e70f51f997ad487a4cb6c026f Third Party Advisory, Issue Tracking, Patch Changed Reference Type https://groups.google.com/forum/#%21msg/syzkaller/frb2XrB5aWk/xCXzkIBcDAAJ No Types Assigned https://groups.google.com/forum/#%21msg/syzkaller/frb2XrB5aWk/xCXzkIBcDAAJ Third Party Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1386286 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1386286 Issue Tracking Changed Reference Type http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dd504589577d8e8e70f51f997ad487a4cb6c026f No Types Assigned http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dd504589577d8e8e70f51f997ad487a4cb6c026f Issue Tracking, Vendor Advisory, Patch Changed Reference Type http://www.securityfocus.com/bid/94217 No Types Assigned http://www.securityfocus.com/bid/94217 Third Party Advisory, VDB Entry Changed Reference Type http://www.openwall.com/lists/oss-security/2016/11/04/3 No Types Assigned http://www.openwall.com/lists/oss-security/2016/11/04/3 Third Party Advisory, Mailing List Added CWE CWE-476 -
CVE Modified by [email protected]
Nov. 28, 2016
Action Type Old Value New Value Removed Reference https://groups.google.com/forum/#!msg/syzkaller/frb2XrB5aWk/xCXzkIBcDAAJ [No Types Assigned] Added Reference https://groups.google.com/forum/#%21msg/syzkaller/frb2XrB5aWk/xCXzkIBcDAAJ [No Types Assigned] Added Reference http://www.securityfocus.com/bid/94217 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2015-8970 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2015-8970
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.05635
percentile