CVE-2017-7518
Kernel: KVM: debug exception via syscall emulation
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB) being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. Linux guests are not affected by this.
Se ha detectado un error en el kernel de Linux en versiones anteriores a la 4.12 en la forma en la que el módulo KVM procesó el bit trap flag(TF) en EFLAGS durante la emulación de la instrucción de la llamada del sistema, lo que conduce a que se lance una excepción de depuración (#DB) en la pila invitada. Un usuario/proceso en un invitado podría utilizar este error para escalar sus privilegios en el invitado. Los invitados de Linux no se han visto afectados por esto.
A flaw was found in the way the Linux KVM module processed the trap flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB) being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. Linux guests are not affected by this.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2017-04-05 CVE Reserved
- 2018-03-06 CVE Published
- 2023-07-24 EPSS Updated
- 2024-08-05 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-250: Execution with Unnecessary Privileges
- CWE-755: Improper Handling of Exceptional Conditions
CAPEC
References (13)
| URL | Tag | Source |
|---|---|---|
| http://www.securityfocus.com/bid/99263 | Third Party Advisory | |
| http://www.securitytracker.com/id/1038782 | Third Party Advisory |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2017/06/23/5 | 2023-11-07 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7518 | 2023-11-07 | |
| https://www.spinics.net/lists/kvm/msg151817.html | 2023-11-07 |
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2018:0395 | 2023-11-07 | |
| https://access.redhat.com/errata/RHSA-2018:0412 | 2023-11-07 | |
| https://usn.ubuntu.com/3619-1 | 2023-11-07 | |
| https://usn.ubuntu.com/3619-2 | 2023-11-07 | |
| https://usn.ubuntu.com/3754-1 | 2023-11-07 | |
| https://www.debian.org/security/2017/dsa-3981 | 2023-11-07 | |
| https://access.redhat.com/security/cve/CVE-2017-7518 | 2018-03-06 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1464473 | 2018-03-06 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0" | - |
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" | 7.4 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" | 7.4 Search vendor "Redhat" for product "Enterprise Linux Server Eus" and version "7.4" | - |
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 Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation" | 7.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "7.0" | - |
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
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04" | lts |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 4.12 Search vendor "Linux" for product "Linux Kernel" and version " < 4.12" | - |
Affected
| ||||||