CVE-2017-17806

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CVE-2017-17806

Summary:

Details: The HMAC implementation (crypto/hmac.c) in the Linux kernel before 4.14.8 does not validate that the underlying cryptographic hash algorithm is unkeyed, allowing a local attacker able to use the AF_ALG-based hash interface (CONFIG_CRYPTO_USER_API_HASH) and the SHA-3 hash algorithm (CONFIG_CRYPTO_SHA3) to cause a kernel stack buffer overflow by executing a crafted sequence of system calls that encounter a missing SHA-3 initialization.

References: https://usn.ubuntu.com/3632-1/, https://www.debian.org/security/2017/dsa-4073, http://www.securityfocus.com/bid/102293, https://access.redhat.com/errata/RHSA-2018:2948, https://usn.ubuntu.com/3617-1/, https://lists.debian.org/debian-lts-announce/2018/01/msg00004.html, https://usn.ubuntu.com/3583-1/, https://usn.ubuntu.com/3583-2/, https://usn.ubuntu.com/3617-2/, https://usn.ubuntu.com/3617-3/, https://usn.ubuntu.com/3619-2/, https://www.debian.org/security/2018/dsa-4082, https://usn.ubuntu.com/3619-1/, https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8, http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.html, http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html, http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.html, http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.html, https://github.com/torvalds/linux/commit/af3ff8045bbf3e32f1a448542e73abb4c8ceb6f1, http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=af3ff8045bbf3e32f1a448542e73abb4c8ceb6f1, http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.html