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CVE-2022-41916— Read one byte past a buffer when normalizing Unicode

Quick assessment

Affected
heimdal heimdal
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Heimdal是Heimdal开源的一个 Kerberos 的实现及安全程序。 Heimdal 7.7.1之前版本存在安全漏洞，该漏洞源于PKI证书验证库中的存在拒绝服务

CVSS 5.9 · Medium EPSS 0.97% · P61

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2022-41916

Vulnerability Information
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Vulnerability Title
Read one byte past a buffer when normalizing Unicode
Source: CVE Program / CVE List V5
Vulnerability Description
Heimdal is an implementation of ASN.1/DER, PKIX, and Kerberos. Versions prior to 7.7.1 are vulnerable to a denial of service vulnerability in Heimdal's PKI certificate validation library, affecting the KDC (via PKINIT) and kinit (via PKINIT), as well as any third-party applications using Heimdal's libhx509. Users should upgrade to Heimdal 7.7.1 or 7.8. There are no known workarounds for this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
Off-by-one错误
Source: CVE Program / CVE List V5
Vulnerability Title
Heimdal 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Heimdal是Heimdal开源的一个 Kerberos 的实现及安全程序。 Heimdal 7.7.1之前版本存在安全漏洞，该漏洞源于PKI证书验证库中的存在拒绝服务
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
heimdal heimdal < 7.7.1 -

II. Public POCs for CVE-2022-41916

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III. Intelligence Information for CVE-2022-41916

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Vendor Advisories for CVE-2022-41916 (4)

Mailing List Discussions for CVE-2022-41916 (1)

IV. Related Vulnerabilities

Same weakness: CWE-193

V. Comments for CVE-2022-41916

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