5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
0.001 Low
EPSS
Percentile
39.7%
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).
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 14.04 | noarch | linux | < 3.13.0-155.205 | UNKNOWN |
ubuntu | 16.04 | noarch | linux | < 4.4.0-121.145 | UNKNOWN |
ubuntu | 14.04 | noarch | linux-aws | < 4.4.0-1017.17 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-aws | < 4.4.0-1055.64 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-azure | < 4.15.0-1013.13~16.04.2 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-euclid | < 4.4.0-9029.31 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-gcp | < 4.15.0-1014.14~16.04.1 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-hwe | < 4.15.0-24.26~16.04.1 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-hwe-edge | < 4.15.0-24.26~16.04.1 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-kvm | < 4.4.0-1021.26 | UNKNOWN |
www.openwall.com/lists/oss-security/2018/08/09/6
cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8
github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe
launchpad.net/bugs/cve/CVE-2017-18344
nvd.nist.gov/vuln/detail/CVE-2017-18344
security-tracker.debian.org/tracker/CVE-2017-18344
ubuntu.com/security/notices/USN-3742-1
ubuntu.com/security/notices/USN-3742-2
www.cve.org/CVERecord?id=CVE-2017-18344
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
0.001 Low
EPSS
Percentile
39.7%