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CVE
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CVE-2017-18344Date: (C)2018-08-04   (M)2024-03-26


The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel before 4.14.8 doesn't properly validate the sigevent->sigev_notify field, which leads to out-of-bounds access in the show_timer function (called when /proc/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE).

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 5.5CVSS Score : 2.1
Exploit Score: 1.8Exploit Score: 3.9
Impact Score: 3.6Impact Score: 2.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: LOCALAccess Vector: LOCAL
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: LOWAuthentication: NONE
User Interaction: NONEConfidentiality: PARTIAL
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: HIGHAvailability: NONE
Integrity: NONE 
Availability: NONE 
  
Reference:
SECTRACK-1041414
BID-104909
EXPLOIT-DB-45175
RHSA-2018:2948
RHSA-2018:3083
RHSA-2018:3096
RHSA-2018:3459
RHSA-2018:3540
RHSA-2018:3586
RHSA-2018:3590
RHSA-2018:3591
USN-3742-1
USN-3742-2
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8
https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe

CPE    2127
cpe:/o:linux:linux_kernel:2.4.27:pre5
cpe:/o:linux:linux_kernel:2.4.27:pre4
cpe:/o:linux:linux_kernel:2.4.27:pre1
cpe:/o:linux:linux_kernel:2.4.27:pre3
...
CWE    1
CWE-125
OVAL    20
oval:org.secpod.oval:def:1502306
oval:org.secpod.oval:def:1502307
oval:org.secpod.oval:def:1502311
oval:org.secpod.oval:def:89049772
...

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