CVE-2017-17805
kernel: Salsa20 encryption algorithm does not correctly handle zero-length inputs allowing local attackers to cause denial-of-service
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
The Salsa20 encryption algorithm in the Linux kernel before 4.14.8 does not correctly handle zero-length inputs, allowing a local attacker able to use the AF_ALG-based skcipher interface (CONFIG_CRYPTO_USER_API_SKCIPHER) to cause a denial of service (uninitialized-memory free and kernel crash) or have unspecified other impact by executing a crafted sequence of system calls that use the blkcipher_walk API. Both the generic implementation (crypto/salsa20_generic.c) and x86 implementation (arch/x86/crypto/salsa20_glue.c) of Salsa20 were vulnerable.
El algoritmo de cifrado Salsa20 en el kernel de Linux en versiones anteriores a la 4.14.8 no maneja correctamente las entradas de longitud cero, lo que permite a un atacante local capaz de utilizar la interfaz skcipher basada en AF_ALG (CONFIG_CRYPTO_USER_API_SKCIPHER) provocar una denegación de servicio (liberación de memoria no inicializada y fallo del kernel) o provocar otro impacto no especificado ejecutando una secuencia manipulada de llamadas al sistema que utilizan la API blkcipher_walk. Tanto la implementación genérica (crypto/salsa20_generic.c) como la implementación x86 (arch/x86/crypto/salsa20_glue.c) de Salsa20 eran vulnerables.
The Salsa20 encryption algorithm in the Linux kernel, before 4.14.8, does not correctly handle zero-length inputs. This allows a local attacker the ability to use the AF_ALG-based skcipher interface to cause a denial of service (uninitialized-memory free and kernel crash) or have an unspecified other impact by executing a crafted sequence of system calls that use the blkcipher_walk API. Both the generic implementation (crypto/salsa20_generic.c) and x86 implementation (arch/x86/crypto/salsa20_glue.c) of Salsa20 are vulnerable.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2017-04-03 CVE Published
- 2017-12-20 CVE Reserved
- 2023-03-08 EPSS Updated
- 2024-08-05 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-20: Improper Input Validation
CAPEC
References (26)
| URL | Tag | Source |
|---|---|---|
| http://www.securityfocus.com/bid/102291 | Third Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2018/01/msg00004.html | Mailing List |
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| https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8 | Issue Tracking |
| URL | Date | SRC |
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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" | >= 2.6.25 < 3.2.97 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.25 < 3.2.97" | - |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.3 < 3.16.52 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.3 < 3.16.52" | - |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.17 < 3.18.89 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.17 < 3.18.89" | - |
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.19 < 4.1.49 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.19 < 4.1.49" | - |
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.2 < 4.4.107 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.2 < 4.4.107" | - |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.5 < 4.9.71 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 4.9.71" | - |
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.10 < 4.14.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.10 < 4.14.8" | - |
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| 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" | - |
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| 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" | - |
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| Opensuse Search vendor "Opensuse" | Leap Search vendor "Opensuse" for product "Leap" | 42.2 Search vendor "Opensuse" for product "Leap" and version "42.2" | - |
Affected
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| Opensuse Project Search vendor "Opensuse Project" | Leap Search vendor "Opensuse Project" for product "Leap" | 42.3 Search vendor "Opensuse Project" for product "Leap" and version "42.3" | - |
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| Suse Search vendor "Suse" | Linux Enterprise Desktop Search vendor "Suse" for product "Linux Enterprise Desktop" | 12 Search vendor "Suse" for product "Linux Enterprise Desktop" and version "12" | sp2 |
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| Suse Search vendor "Suse" | Linux Enterprise Desktop Search vendor "Suse" for product "Linux Enterprise Desktop" | 12 Search vendor "Suse" for product "Linux Enterprise Desktop" and version "12" | sp3 |
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| Suse Search vendor "Suse" | Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server" | 11 Search vendor "Suse" for product "Linux Enterprise Server" and version "11" | extra |
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| Suse Search vendor "Suse" | Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server" | 11 Search vendor "Suse" for product "Linux Enterprise Server" and version "11" | sp4 |
Affected
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| Suse Search vendor "Suse" | Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server" | 12 Search vendor "Suse" for product "Linux Enterprise Server" and version "12" | sp2 |
Affected
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| Suse Search vendor "Suse" | Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server" | 12 Search vendor "Suse" for product "Linux Enterprise Server" and version "12" | sp3 |
Affected
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| Suse Search vendor "Suse" | Linux Enterprise Server For Raspberry Pi Search vendor "Suse" for product "Linux Enterprise Server For Raspberry Pi" | 12 Search vendor "Suse" for product "Linux Enterprise Server For Raspberry Pi" and version "12" | sp2 |
Affected
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| 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" | - |
Affected
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| 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
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| 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
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 17.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "17.10" | - |
Affected
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