CVE-2017-18344
Linux Kernel 4.14.7 (Ubuntu 16.04 / CentOS 7) - (KASLR & SMEP Bypass) Arbitrary File Read
Severity Score
5.5
*CVSS v3
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
1
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
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/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE).
La implementación de llamada del sistema timer_create en kernel/time/posix-timers.c en el kernel de Linux en versiones anteriores a la 4.14.8 no valida correctamente el campo sigevent->sigev_notify, conduciendo a un acceso fuera de límites en la función show_timer (que se llama cuando se lee /proc/$PID/timers). Esto permite que las aplicaciones del espacio del usuario lean memoria del kernel arbitraria (en un kernel construido con CONFIG_POSIX_TIMERS y CONFIG_CHECKPOINT_RESTORE).
The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel doesn't properly validate the sigevent->sigev_notify field, which leads to out-of-bounds access in the show_timer function.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2018-07-26 CVE Reserved
- 2018-07-26 CVE Published
- 2023-07-20 EPSS Updated
- 2024-08-05 CVE Updated
- 2024-08-05 First Exploit
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-125: Out-of-bounds Read
CAPEC
References (17)
| URL | Tag | Source |
|---|---|---|
| http://www.securityfocus.com/bid/104909 | Third Party Advisory | |
| http://www.securitytracker.com/id/1041414 | Third Party Advisory | |
| https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8 | Third Party Advisory |
| URL | Date | SRC |
|---|---|---|
| https://www.exploit-db.com/exploits/45175 | 2024-08-05 |
| URL | Date | SRC |
|---|---|---|
| https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe | 2020-10-15 |
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2018:2948 | 2020-10-15 | |
| https://access.redhat.com/errata/RHSA-2018:3083 | 2020-10-15 | |
| https://access.redhat.com/errata/RHSA-2018:3096 | 2020-10-15 | |
| https://access.redhat.com/errata/RHSA-2018:3459 | 2020-10-15 | |
| https://access.redhat.com/errata/RHSA-2018:3540 | 2020-10-15 | |
| https://access.redhat.com/errata/RHSA-2018:3586 | 2020-10-15 | |
| https://access.redhat.com/errata/RHSA-2018:3590 | 2020-10-15 | |
| https://access.redhat.com/errata/RHSA-2018:3591 | 2020-10-15 | |
| https://usn.ubuntu.com/3742-1 | 2020-10-15 | |
| https://usn.ubuntu.com/3742-2 | 2020-10-15 | |
| https://access.redhat.com/security/cve/CVE-2017-18344 | 2018-11-13 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1610958 | 2018-11-13 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 4.14.8 Search vendor "Linux" for product "Linux Kernel" and version " < 4.14.8" | - |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04" | esm |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04" | lts |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Mrg Realtime Search vendor "Redhat" for product "Mrg Realtime" | 2.0 Search vendor "Redhat" for product "Mrg Realtime" and version "2.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop" | 7.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "7.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server" | 7.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "7.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus" | 7.2 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.2" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus" | 7.3 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.3" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus" | 7.4 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.4" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Eus Search vendor "Redhat" for product "Enterprise Linux Server Eus" | 7.3 Search vendor "Redhat" for product "Enterprise Linux Server Eus" and version "7.3" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Eus Search vendor "Redhat" for product "Enterprise Linux Server Eus" | 7.5 Search vendor "Redhat" for product "Enterprise Linux Server Eus" and version "7.5" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus" | 7.2 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "7.2" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus" | 7.3 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "7.3" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus" | 7.4 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "7.4" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation" | 7.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "7.0" | - |
Affected
| ||||||