5.5

CVE-2018-12896

Exploit
An issue was discovered in the Linux kernel through 4.17.3. An Integer Overflow in kernel/time/posix-timers.c in the POSIX timer code is caused by the way the overrun accounting works. Depending on interval and expiry time values, the overrun can be larger than INT_MAX, but the accounting is int based. This basically makes the accounting values, which are visible to user space via timer_getoverrun(2) and siginfo::si_overrun, random. For example, a local user can cause a denial of service (signed integer overflow) via crafted mmap, futex, timer_create, and timer_settime system calls.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version <= 4.17.3
Debian ≫ Debian Linux Version8.0
Canonical ≫ Ubuntu Linux Version12.04 SwEditionesm
Canonical ≫ Ubuntu Linux Version14.04 SwEditionlts
Canonical ≫ Ubuntu Linux Version16.04 SwEditionlts
Canonical ≫ Ubuntu Linux Version18.04 SwEditionlts
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.64% 0.458
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd@nist.gov 2.1 3.9 2.9
AV:L/AC:L/Au:N/C:N/I:N/A:P
CWE-190 Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

https://usn.ubuntu.com/3849-1/
Third Party Advisory
https://usn.ubuntu.com/3849-2/
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
Third Party Advisory
Mailing List
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
Third Party Advisory
Mailing List
https://usn.ubuntu.com/3848-1/
Third Party Advisory
https://usn.ubuntu.com/3848-2/
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html
Third Party Advisory
Mailing List
https://bugzilla.kernel.org/show_bug.cgi?id=200189
Vendor Advisory
Issue Tracking
https://github.com/lcytxw/bug_repro/tree/master/bug_200189
Third Party Advisory
Exploit
https://github.com/torvalds/linux/commit/78c9c4dfbf8c04883941445a195276bb4bb92c76
Patch
Third Party Advisory
https://usn.ubuntu.com/3847-1/
Third Party Advisory
https://usn.ubuntu.com/3847-2/
Third Party Advisory
https://usn.ubuntu.com/3847-3/
Third Party Advisory