CVE-2020-13974
kernel: integer overflow in k_ascii() in drivers/tty/vt/keyboard.c
Severity Score
7.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
1
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
An issue was discovered in the Linux kernel 4.4 through 5.7.1. drivers/tty/vt/keyboard.c has an integer overflow if k_ascii is called several times in a row, aka CID-b86dab054059. NOTE: Members in the community argue that the integer overflow does not lead to a security issue in this case.
Se detectó un problema en el kernel de Linux versión 4.4 hasta la versión 5.7.1. En el archivo drivers/tty/vt/keyboard.c presenta un desbordamiento de enteros si se llama a la función k_ascii varias veces seguidas, también se conoce como CID-b86dab054059. NOTA: Los miembros de la comunidad argumentan que el desbordamiento de números enteros no conduce a un problema de seguridad en este caso
A flaw integer overflow in the Linux kernel's virtual terminal keyboard driver was found in the way the user sends some specific keyboard code multiple times. A local user could use this flaw to crash the system or possibly escalate their privileges on the system.
*Credits:
N/A
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Scope
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Attack Vector
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* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
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* Organization's Worst-case Scenario
Timeline
- 2020-06-09 CVE Reserved
- 2020-06-09 CVE Published
- 2023-03-08 EPSS Updated
- 2024-08-04 CVE Updated
- 2024-08-04 First Exploit
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-190: Integer Overflow or Wraparound
CAPEC
References (14)
| URL | Tag | Source |
|---|---|---|
| https://lists.debian.org/debian-lts-announce/2020/08/msg00019.html | Mailing List |
|
| https://www.oracle.com/security-alerts/cpujul2022.html | Third Party Advisory |
|
| URL | Date | SRC |
|---|---|---|
| https://lkml.org/lkml/2020/3/22/482 | 2024-08-04 |
| URL | Date | SRC |
|---|---|---|
| https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b86dab054059b970111b5516ae548efaae5b3aae | 2023-02-24 |
| URL | Date | SRC |
|---|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html | 2023-02-24 | |
| http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html | 2023-02-24 | |
| https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=dad0bf9ce93fa40b667eccd3306783f4db4b932b | 2023-02-24 | |
| https://usn.ubuntu.com/4427-1 | 2023-02-24 | |
| https://usn.ubuntu.com/4439-1 | 2023-02-24 | |
| https://usn.ubuntu.com/4440-1 | 2023-02-24 | |
| https://usn.ubuntu.com/4483-1 | 2023-02-24 | |
| https://usn.ubuntu.com/4485-1 | 2023-02-24 | |
| https://access.redhat.com/security/cve/CVE-2020-13974 | 2022-05-10 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2016169 | 2022-05-10 |
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" | < 4.4.227 Search vendor "Linux" for product "Linux Kernel" and version " < 4.4.227" | - |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.5 < 4.9.227 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 4.9.227" | - |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.10 < 4.14.184 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.10 < 4.14.184" | - |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.15 < 4.19.128 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 4.19.128" | - |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.20 < 5.4.46 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.20 < 5.4.46" | - |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.5 < 5.6.18 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.6.18" | - |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.7 < 5.7.2 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.7 < 5.7.2" | - |
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
| ||||||
| 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" | esm |
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" | esm |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04" | lts |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 20.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "20.04" | lts |
Affected
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