CVE-2018-12896
Summary
| CVE | CVE-2018-12896 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2018-07-02 17:29:00 UTC |
| Updated | 2019-04-03 12:04:00 UTC |
| Description | 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. |
Risk And Classification
Problem Types: CWE-190
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Canonical | Ubuntu Linux | 12.04 | All | All | All |
| Operating System | Canonical | Ubuntu Linux | 14.04 | All | All | All |
| Operating System | Canonical | Ubuntu Linux | 16.04 | All | All | All |
| Operating System | Canonical | Ubuntu Linux | 18.04 | All | All | All |
| Operating System | Canonical | Ubuntu Linux | 12.04 | All | All | All |
| Operating System | Canonical | Ubuntu Linux | 14.04 | All | All | All |
| Operating System | Canonical | Ubuntu Linux | 16.04 | All | All | All |
| Operating System | Canonical | Ubuntu Linux | 18.04 | All | All | All |
| Operating System | Debian | Debian Linux | 8.0 | All | All | All |
| Operating System | Debian | Debian Linux | 8.0 | All | All | All |
| Operating System | Linux | Linux Kernel | All | All | All | All |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| USN-3848-2: Linux kernel (Xenial HWE) vulnerabilities | Ubuntu security notices | Ubuntu | UBUNTU | usn.ubuntu.com | Third Party Advisory |
| USN-3847-3: Linux kernel (Azure) vulnerabilities | Ubuntu security notices | Ubuntu | UBUNTU | usn.ubuntu.com | Third Party Advisory |
| USN-3848-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu | UBUNTU | usn.ubuntu.com | Third Party Advisory |
| [SECURITY] [DLA 1715-1] linux-4.9 security update | MLIST | lists.debian.org | Mailing List, Third Party Advisory |
| [SECURITY] [DLA 1731-2] linux regression update | MLIST | lists.debian.org | Mailing List, Third Party Advisory |
| [SECURITY] [DLA 1731-1] linux security update | MLIST | lists.debian.org | Mailing List, Third Party Advisory |
| posix-timers: Sanitize overrun handling · torvalds/linux@78c9c4d · GitHub | MISC | github.com | Patch, Third Party Advisory |
| USN-3847-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu | UBUNTU | usn.ubuntu.com | Third Party Advisory |
| USN-3849-2: Linux kernel (Trusty HWE) vulnerabilities | Ubuntu security notices | UBUNTU | usn.ubuntu.com | Third Party Advisory |
| USN-3847-2: Linux kernel (HWE) vulnerabilities | Ubuntu security notices | Ubuntu | UBUNTU | usn.ubuntu.com | Third Party Advisory |
| bug_repro/bug_200189 at master · lcytxw/bug_repro · GitHub | MISC | github.com | Exploit, Third Party Advisory |
| 200189 – UBSAN: Undefined behaviour in kernel/time/posix-timers.c:705 | MISC | bugzilla.kernel.org | Issue Tracking, Vendor Advisory |
| USN-3849-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu | UBUNTU | usn.ubuntu.com | Third Party Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.