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CVE-2017-17806

HIGH
7.8
CVSS Score
Published: December 20, 2017 at 11:00 PM UTC
Updated: June 17, 2026 at 01:11 AM UTC
8 products affected across 6 vendorsLinux KernelDebian LinuxUbuntu Linux

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Severity
HIGH7.8
Exploit prediction
EPSS 0.6%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ubuntu Linux· Canonicalrubygems
95%
12.0414.0416.0417.10
Debian Linux· Debiandrupal
95%
8.09.0
Linux Kernel· Linux
95%
v < 3.2.973.17 ≤ v < 3.18.893.19 ≤ v < 4.1.493.3 ≤ v < 3.16.524.10 ≤ v < 4.14.84.2 ≤ v < 4.4.1074.5 ≤ v < 4.9.71
Affected range stops below 3.16.52, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.18.89, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.2.97, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.1.49, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.14.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.4.107, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.9.71, so it looks safe — our inference, not a vendor statement
Leap· openSUSEdrupal
95%
42.2
Leap· openSUSE Project
95%
42.3
Linux Enterprise Desktop· SUSE
95%
12 sp212 sp3
Linux Enterprise Server· SUSE
95%
11 extra11 sp412 sp212 sp3
Linux Enterprise Server for Raspberry Pi· SUSE
95%
12 sp2

References (21)

x_refsource_CONFIRMPatch
Source: [email protected]
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=af3ff8045bbf3e32f1a448542e73abb4c8ceb6f1
Vendor Advisoryx_refsource_SUSEIssue TrackingPatchThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.html
Vendor Advisoryx_refsource_SUSEIssue TrackingPatchThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html
Vendor Advisoryx_refsource_SUSEIssue TrackingPatchThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.html
Vendor Advisoryx_refsource_SUSEIssue TrackingPatchThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.html
Vendor Advisoryx_refsource_SUSEIssue TrackingThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.html
VDB Entryx_refsource_BIDThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/102293
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2018:2948

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-787

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