CVE-2015-7550

MEDIUM

Description

The keyctl_read_key function in security/keys/keyctl.c in the Linux kernel before 4.3.4 does not properly use a semaphore, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted application that leverages a race condition between keyctl_revoke and keyctl_read calls.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b4a1b4f5047e4f54e194681125c74c0aa64d637d

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html

http://www.debian.org/security/2016/dsa-3434

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.4

http://www.securityfocus.com/bid/79903

http://www.ubuntu.com/usn/USN-2888-1

http://www.ubuntu.com/usn/USN-2890-1

http://www.ubuntu.com/usn/USN-2890-2

http://www.ubuntu.com/usn/USN-2890-3

http://www.ubuntu.com/usn/USN-2911-1

http://www.ubuntu.com/usn/USN-2911-2

https://bugzilla.redhat.com/show_bug.cgi?id=1291197

https://github.com/torvalds/linux/commit/b4a1b4f5047e4f54e194681125c74c0aa64d637d

https://security-tracker.debian.org/tracker/CVE-2015-7550

Details

Source: MITRE

Published: 2016-02-08

Updated: 2017-11-04

Type: CWE-362

Risk Information

CVSS v2.0

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 v3.0

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 4.3.3 (inclusive)

Tenable Plugins

View all (24 total)

IDNameProductFamilySeverity
127146NewStart CGSL MAIN 5.04 : kernel Multiple Vulnerabilities (NS-SA-2019-0004)NessusNewStart CGSL Local Security Checks
critical
124973EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1520)NessusHuawei Local Security Checks
high
124812EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1488)NessusHuawei Local Security Checks
high
93289SUSE SLES11 Security Update : kernel (SUSE-SU-2016:2074-1)NessusSuSE Local Security Checks
critical
90884SUSE SLES11 Security Update : kernel (SUSE-SU-2016:1203-1)NessusSuSE Local Security Checks
critical
90264SUSE SLED11 / SLES11 Security Update : kernel (SUSE-SU-2016:0911-1)NessusSuSE Local Security Checks
critical
89400Fedora 23 : kernel-4.2.8-300.fc23 (2015-c59710b05d)NessusFedora Local Security Checks
medium
89393Fedora 22 : kernel-4.2.8-200.fc22 (2015-c1c2f5e168)NessusFedora Local Security Checks
medium
89026Ubuntu 14.04 LTS : linux-lts-vivid regression (USN-2910-2)NessusUbuntu Local Security Checks
high
89022SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2016:0585-1)NessusSuSE Local Security Checks
high
88902Ubuntu 12.04 LTS : linux vulnerability (USN-2911-1)NessusUbuntu Local Security Checks
medium
88901Ubuntu 14.04 LTS : linux-lts-vivid vulnerabilities (USN-2910-1)NessusUbuntu Local Security Checks
high
88896Ubuntu 12.04 LTS : linux-lts-trusty vulnerabilities (USN-2907-2)NessusUbuntu Local Security Checks
high
88895Ubuntu 14.04 LTS : linux vulnerabilities (USN-2907-1)NessusUbuntu Local Security Checks
high
88605openSUSE Security Update : the Linux Kernel (openSUSE-2016-136)NessusSuSE Local Security Checks
high
88545openSUSE Security Update : the Linux Kernel (openSUSE-2016-124)NessusSuSE Local Security Checks
critical
88542openSUSE Security Update : the Linux Kernel (openSUSE-2016-116)NessusSuSE Local Security Checks
high
88526Ubuntu 15.10 : linux-raspi2 vulnerabilities (USN-2890-3)NessusUbuntu Local Security Checks
critical
88525Ubuntu 14.04 LTS : linux-lts-wily vulnerabilities (USN-2890-2)NessusUbuntu Local Security Checks
critical
88524Ubuntu 15.10 : linux vulnerabilities (USN-2890-1)NessusUbuntu Local Security Checks
critical
88521Ubuntu 14.04 LTS : linux-lts-utopic vulnerabilities (USN-2888-1)NessusUbuntu Local Security Checks
medium
88006SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2016:0168-1)NessusSuSE Local Security Checks
high
87741Debian DSA-3434-1 : linux - security updateNessusDebian Local Security Checks
medium
87738Debian DLA-378-1 : linux-2.6 security updateNessusDebian Local Security Checks
medium