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Home / CVE DB / CVE-2017-17806
Standard
Vulnerability Identifier

CVE-2017-17806

2017-12-20
Severity Assessment
7.8
HIGH
CVSS v3.x Score
Clinical Analysis (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.

Vector Sequencing

Attack Parameters

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Impact Consequences

Technical Impact

Unchanged
Scope
High
Confidentiality
High
Integrity
High
Availability
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v2 Score (Legacy)
7.2

For backward compatibility

EPSS Probability
0.01%

Percentile: 1.3%

Weakness Classification

CWE-CWE-787

View CWE Details ↗
Affected Population

Affected Configurations

Total: 12 detected entries

Software List Scrollable
ca
ubuntu_linux
Vendor: canonical • v14.04
ca
ubuntu_linux
Vendor: canonical • v16.04
de
debian_linux
Vendor: debian • v8.0
op
leap
Vendor: opensuse_project • v42.3
ca
ubuntu_linux
Vendor: canonical • v12.04
su
linux_enterprise_server
Vendor: suse • v12
su
linux_enterprise_server
Vendor: suse • v11
de
debian_linux
Vendor: debian • v9.0
su
linux_enterprise_server_for_raspberry_pi
Vendor: suse • v12
ca
ubuntu_linux
Vendor: canonical • v17.10
su
linux_enterprise_desktop
Vendor: suse • v12
op
leap
Vendor: opensuse • v42.2
Timeline

Time Line

PUBLICATION
20 Dec 2017
MODIFICATION
20 Apr 2025
Impact Statistics

Key Metrics

CVSS Score
7.8
HIGH
Products
12
Affected
Remediation Protocol

Recommended Solution

No automatic solution found. Check vendor references.
Patch Library
No direct patch listed in database.
Recommended Actions for Administrators

Immediate Action Plan

1. Inventory

Identify all affected systems in your infrastructure.

2. Assessment

Assess exposure and criticality for your organization.

3. Mitigation

Apply patches or available workarounds.

4. Verification

Test and confirm effectiveness of applied measures.

Sources & Bibliography
NIST NVD MITRE CVE External Reference ↗ External Reference ↗ External Reference ↗ External Reference ↗ External Reference ↗