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.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-1232-1 linux security update
Debian DSA Debian DSA DSA-4073-1 linux security update
Debian DSA Debian DSA DSA-4082-1 linux security update
EUVD EUVD EUVD-2017-8956 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.
Ubuntu USN Ubuntu USN USN-3617-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-3617-2 Linux (HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-3617-3 Linux kernel (Raspberry Pi 2) vulnerabilities
Ubuntu USN Ubuntu USN USN-3619-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-3619-2 Linux kernel (Xenial HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-3620-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-3620-2 Linux kernel (Trusty HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-3632-1 Linux kernel (Azure) vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-05T20:59:17.879Z

Reserved: 2017-12-20T00:00:00

Link: CVE-2017-17805

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2017-12-20T23:29:00.327

Modified: 2025-04-20T01:37:25.860

Link: CVE-2017-17805

cve-icon Redhat

Severity : Moderate

Publid Date: 2017-11-29T00:00:00Z

Links: CVE-2017-17805 - Bugzilla

cve-icon OpenCVE Enrichment

No data.