Vulnerability Monitor

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CVE-2017-17805

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.

Published

2017-12-20T23:29:00.327

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:C/I:C/A:C

  • Access Vector: LOCAL
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: COMPLETE
  • Integrity Impact: COMPLETE
  • Availability Impact: COMPLETE
Exploitability Score

3.9

Impact Score

10.0

Weaknesses
  • Type: Primary
    CWE-20
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System linux linux_kernel < 3.2.97 Yes
Operating System linux linux_kernel < 3.16.52 Yes
Operating System linux linux_kernel < 3.18.89 Yes
Operating System linux linux_kernel < 4.1.49 Yes
Operating System linux linux_kernel < 4.4.107 Yes
Operating System linux linux_kernel < 4.9.71 Yes
Operating System linux linux_kernel < 4.14.8 Yes
Operating System debian debian_linux 8.0 Yes
Operating System debian debian_linux 9.0 Yes
Operating System opensuse leap 42.2 Yes
Operating System opensuse_project leap 42.3 Yes
Operating System suse linux_enterprise_desktop 12 Yes
Operating System suse linux_enterprise_desktop 12 Yes
Operating System suse linux_enterprise_server 11 Yes
Operating System suse linux_enterprise_server 11 Yes
Operating System suse linux_enterprise_server 12 Yes
Operating System suse linux_enterprise_server 12 Yes
Operating System suse linux_enterprise_server_for_raspberry_pi 12 Yes
Operating System canonical ubuntu_linux 12.04 Yes
Operating System canonical ubuntu_linux 14.04 Yes
Operating System canonical ubuntu_linux 16.04 Yes
Operating System canonical ubuntu_linux 17.10 Yes
References