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CVE
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CVE-2015-7550Date: (C)2016-02-11   (M)2024-03-26


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.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 5.5CVSS Score : 4.9
Exploit Score: 1.8Exploit Score: 3.9
Impact Score: 3.6Impact Score: 6.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: LOCALAccess Vector: LOCAL
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: LOWAuthentication: NONE
User Interaction: NONEConfidentiality: NONE
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: NONEAvailability: COMPLETE
Integrity: NONE 
Availability: HIGH 
  
Reference:
BID-79903
DSA-3434
SUSE-SU-2016:0911
SUSE-SU-2016:1102
SUSE-SU-2016:2074
USN-2888-1
USN-2890-1
USN-2890-2
USN-2890-3
USN-2911-1
USN-2911-2
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b4a1b4f5047e4f54e194681125c74c0aa64d637d
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.4
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

CPE    1
cpe:/o:linux:linux_kernel
CWE    1
CWE-362
OVAL    19
oval:org.secpod.oval:def:702985
oval:org.secpod.oval:def:702994
oval:org.secpod.oval:def:702990
oval:org.secpod.oval:def:109946
...

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