CVE-2015-8970

medium
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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.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dd504589577d8e8e70f51f997ad487a4cb6c026f

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.2

http://www.openwall.com/lists/oss-security/2016/11/04/3

http://www.securityfocus.com/bid/94217

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

https://github.com/torvalds/linux/commit/dd504589577d8e8e70f51f997ad487a4cb6c026f

https://groups.google.com/forum/#!msg/syzkaller/frb2XrB5aWk/xCXzkIBcDAAJ

Details

Source: MITRE

Published: 2016-11-28

Updated: 2018-08-13

Type: CWE-476

Risk Information

CVSS v2

Base Score: 4.9

Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to 4.4.1 (inclusive)

Tenable Plugins

View all (12 total)

IDNameProductFamilySeverity
124990EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1537)NessusHuawei Local Security Checks
high
124813EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1489)NessusHuawei Local Security Checks
critical
102734CentOS 7 : kernel (CESA-2017:1842) (Stack Clash)NessusCentOS Local Security Checks
high
102645Scientific Linux Security Update : kernel on SL7.x x86_64 (20170801)NessusScientific Linux Local Security Checks
high
102511Oracle Linux 7 : kernel (ELSA-2017-1842-1) (Stack Clash)NessusOracle Linux Local Security Checks
critical
102350RHEL 6 : MRG (RHSA-2017:2444)NessusRed Hat Local Security Checks
high
102349RHEL 7 : kernel (RHSA-2017:2437)NessusRed Hat Local Security Checks
high
102281Oracle Linux 7 : kernel (ELSA-2017-1842)NessusOracle Linux Local Security Checks
high
102151RHEL 7 : kernel-rt (RHSA-2017:2077)NessusRed Hat Local Security Checks
high
102143RHEL 7 : kernel (RHSA-2017:1842) (Stack Clash)NessusRed Hat Local Security Checks
high
100214SUSE SLES11 Security Update : kernel (SUSE-SU-2017:1301-1)NessusSuSE Local Security Checks
high
97297SUSE SLES11 Security Update : kernel (SUSE-SU-2017:0494-1)NessusSuSE Local Security Checks
critical