CVE-2017-17806

HIGH EPSS 42.5%

Published Dec 20, 20178y ago · Modified Jun 17, 20262w ago

7.8 CVSS 3.1

High

Published Dec 20, 2017 8y ago

Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score

7.8

Exploitability

1.8

Impact

5.9

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector Local

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope Unchanged

Confidentiality High

Integrity High

Availability High

Threat Intelligence

EPSS Exploit Probability

42.5% percentile

Exploit & Patch Status

No Known Exploit

Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

Affected Products 22

Vendor	Product	Version	Range
linux	linux_kernel	*	<3.2.97
linux	linux_kernel	*	≥3.3 – <3.16.52
linux	linux_kernel	*	≥3.17 – <3.18.89
linux	linux_kernel	*	≥3.19 – <4.1.49
linux	linux_kernel	*	≥4.2 – <4.4.107
linux	linux_kernel	*	≥4.5 – <4.9.71
linux	linux_kernel	*	≥4.10 – <4.14.8
debian	debian_linux	8.0	any
debian	debian_linux	9.0	any
opensuse	leap	42.2	any
opensuse_project	leap	42.3	any
suse	linux_enterprise_desktop	12	any
suse	linux_enterprise_desktop	12	any
suse	linux_enterprise_server	11	any
suse	linux_enterprise_server	11	any
suse	linux_enterprise_server	12	any
suse	linux_enterprise_server	12	any
suse	linux_enterprise_server_for_raspberry_pi	12	any
canonical	ubuntu_linux	12.04	any
canonical	ubuntu_linux	14.04	any
canonical	ubuntu_linux	16.04	any
canonical	ubuntu_linux	17.10	any

References 21

git.kernel.org http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=af3ff8045bbf3e32f1a448542e73abb4c8ceb6f1

Patch
lists.opensuse.org http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.html

Issue TrackingPatchThird Party Advisory
lists.opensuse.org http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html

Issue TrackingPatchThird Party Advisory
lists.opensuse.org http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.html

Issue TrackingPatchThird Party Advisory
lists.opensuse.org http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.html

Issue TrackingPatchThird Party Advisory
lists.opensuse.org http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.html

Issue TrackingThird Party Advisory
securityfocus.com http://www.securityfocus.com/bid/102293

Third Party AdvisoryVDB Entry
access.redhat.com https://access.redhat.com/errata/RHSA-2018:2948

Third Party Advisory
github.com https://github.com/torvalds/linux/commit/af3ff8045bbf3e32f1a448542e73abb4c8ceb6f1

Patch
lists.debian.org https://lists.debian.org/debian-lts-announce/2018/01/msg00004.html

Third Party Advisory
usn.ubuntu.com https://usn.ubuntu.com/3583-1/

Third Party Advisory
usn.ubuntu.com https://usn.ubuntu.com/3583-2/

Third Party Advisory
usn.ubuntu.com https://usn.ubuntu.com/3617-1/

Third Party Advisory
usn.ubuntu.com https://usn.ubuntu.com/3617-2/

Third Party Advisory
usn.ubuntu.com https://usn.ubuntu.com/3617-3/

Third Party Advisory
usn.ubuntu.com https://usn.ubuntu.com/3619-1/

Third Party Advisory
usn.ubuntu.com https://usn.ubuntu.com/3619-2/

Third Party Advisory
usn.ubuntu.com https://usn.ubuntu.com/3632-1/

Third Party Advisory
debian.org https://www.debian.org/security/2017/dsa-4073

Third Party Advisory
debian.org https://www.debian.org/security/2018/dsa-4082

Third Party Advisory
kernel.org https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8

Issue TrackingRelease Notes

Remediation

git.kernel.org http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=af3ff8045bbf3e32f1a448542e73abb4c8ceb6f1

Patch
lists.opensuse.org http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.html

Issue TrackingPatchThird Party Advisory
lists.opensuse.org http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html

Issue TrackingPatchThird Party Advisory
lists.opensuse.org http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.html

Issue TrackingPatchThird Party Advisory
lists.opensuse.org http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.html

Issue TrackingPatchThird Party Advisory
github.com https://github.com/torvalds/linux/commit/af3ff8045bbf3e32f1a448542e73abb4c8ceb6f1

Patch