CVE-2017-18344
Summary
| CVE | CVE-2017-18344 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2018-07-26 19:29:00 UTC |
| Updated | 2020-10-15 13:28:00 UTC |
| Description | 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). |
Risk And Classification
Problem Types: CWE-125
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 | 12.04 | All | All | All |
| Operating System | Canonical | Ubuntu Linux | 14.04 | All | All | All |
| Operating System | Linux | Linux Kernel | All | All | All | All |
| Operating System | Linux | Linux Kernel | All | All | All | All |
| Operating System | Redhat | Enterprise Linux Desktop | 7.0 | All | All | All |
| Operating System | Redhat | Enterprise Linux Desktop | 7.0 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server | 7.0 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server | 7.0 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server Aus | 7.2 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server Aus | 7.3 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server Aus | 7.4 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server Aus | 7.2 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server Aus | 7.3 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server Aus | 7.4 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server Eus | 7.3 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server Eus | 7.5 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server Eus | 7.3 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server Eus | 7.5 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server Tus | 7.2 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server Tus | 7.3 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server Tus | 7.4 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server Tus | 7.2 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server Tus | 7.3 | All | All | All |
| Operating System | Redhat | Enterprise Linux Server Tus | 7.4 | All | All | All |
| Operating System | Redhat | Enterprise Linux Workstation | 7.0 | All | All | All |
| Operating System | Redhat | Enterprise Linux Workstation | 7.0 | All | All | All |
| Application | Redhat | Mrg Realtime | 2.0 | All | All | All |
| Application | Redhat | Mrg Realtime | 2.0 | All | All | All |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Linux Kernel 4.14.7 (Ubuntu 16.04 / CentOS 7) - (KASLR & SMEP Bypass) Arbitrary File Read | EXPLOIT-DB | www.exploit-db.com | Exploit, Third Party Advisory, VDB Entry |
| Red Hat Customer Portal | REDHAT | access.redhat.com | Third Party Advisory |
| Red Hat Customer Portal | REDHAT | access.redhat.com | Third Party Advisory |
| Red Hat Customer Portal | REDHAT | access.redhat.com | Third Party Advisory |
| USN-3742-1: Linux kernel vulnerabilities | Ubuntu security notices | UBUNTU | usn.ubuntu.com | Third Party Advisory |
| Red Hat Customer Portal | REDHAT | access.redhat.com | Third Party Advisory |
| cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8 | MISC | cdn.kernel.org | Third Party Advisory |
| USN-3742-2: Linux kernel (Trusty HWE) vulnerabilities | Ubuntu security notices | UBUNTU | usn.ubuntu.com | Third Party Advisory |
| Red Hat Customer Portal | REDHAT | access.redhat.com | Third Party Advisory |
| Linux Kernel show_timer() Input Validation Flaw Lets Local Users View Portions of System Memory on the Target System - SecurityTracker | SECTRACK | www.securitytracker.com | Third Party Advisory, VDB Entry |
| Red Hat Customer Portal | REDHAT | access.redhat.com | Third Party Advisory |
| posix-timer: Properly check sigevent->sigev_notify · torvalds/linux@cef31d9 · GitHub | MISC | github.com | Patch, Third Party Advisory |
| Red Hat Customer Portal | REDHAT | access.redhat.com | Third Party Advisory |
| Malformed Request | BID | www.securityfocus.com | Third Party Advisory, VDB Entry |
| Red Hat Customer Portal | REDHAT | access.redhat.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.