CVE-2017-17805

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    CVE-2017-17805

    Published: 20 Dec 2017Last Modified: 15 Mar 2026

    Summary:

    Details: 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.

    References: https://lists.debian.org/debian-lts-announce/2018/01/msg00004.html, https://usn.ubuntu.com/3617-2/, https://usn.ubuntu.com/3619-1/, https://usn.ubuntu.com/3620-1/, http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.html, http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.html, https://access.redhat.com/errata/RHSA-2018:2948, https://usn.ubuntu.com/3632-1/, https://www.debian.org/security/2017/dsa-4073, http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.html, http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.html, https://access.redhat.com/errata/RHSA-2018:3096, https://usn.ubuntu.com/3617-1/, https://usn.ubuntu.com/3617-3/, https://usn.ubuntu.com/3619-2/, https://usn.ubuntu.com/3620-2/, https://www.debian.org/security/2018/dsa-4082, http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html, http://www.securityfocus.com/bid/102291, https://access.redhat.com/errata/RHSA-2018:3083, https://access.redhat.com/errata/RHSA-2019:2473, https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8, https://github.com/torvalds/linux/commit/ecaaab5649781c5a0effdaf298a925063020500e, http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ecaaab5649781c5a0effdaf298a925063020500e

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High