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Vulnerability · Published Nov 15, 2022 · Assigned by GitHub_M

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

Medium 5.9

In plain English

A medium-severity security flaw in heimdal from heimdal. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 63% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)1.0%top 37.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20heimdal7.7.1-r0ALPINE-CVE-2022-41916
Alpine:v3.21heimdal7.7.1-r0ALPINE-CVE-2022-41916
Alpine:v3.22heimdal7.7.1-r0ALPINE-CVE-2022-41916
Alpine:v3.23heimdal7.7.1-r0ALPINE-CVE-2022-41916
Alpine:v3.24heimdal7.7.1-r0ALPINE-CVE-2022-41916
Debian:12heimdal7.8.git20221115.a6cf945+dfsg-1DEBIAN-CVE-2022-41916
Debian:13heimdal7.8.git20221115.a6cf945+dfsg-1DEBIAN-CVE-2022-41916
Debian:14heimdal7.8.git20221115.a6cf945+dfsg-1DEBIAN-CVE-2022-41916
Ubuntu:22.04:LTSheimdalno fix listedUBUNTU-CVE-2022-41916
Ubuntu:24.04:LTSheimdalno fix listedUBUNTU-CVE-2022-41916
Ubuntu:25.10heimdalno fix listedUBUNTU-CVE-2022-41916
Ubuntu:26.04:LTSheimdalno fix listedUBUNTU-CVE-2022-41916
Ubuntu:26.10heimdalno fix listedUBUNTU-CVE-2022-41916

Affected products (as reported)

VendorProductVersions
heimdal heimdal < 7.7.1

Weakness: CWE-193 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References