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before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the ASN.1 codec used by the Key Distribution Center 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fix for CVE-2022-3437 included changing memcmp to be constant time and a workaround for a compiler bug by adding \"!= 0\" comparisons to the result of memcmp. When these patches were backported to the heimdal-7.7.1 and heimdal-7.8.0 branches (and possibly other branches) a logic inversion sneaked in causing the validation of message integrity codes in gssapi/arcfour to be inverted.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2022-45142.json","reference_id":"","reference_type":"","scores":[],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2022-45142.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2022-45142","reference_id":"","reference_type":"","scores":[{"value":"0.00088","scoring_system":"epss","scoring_elements":"0.25178","published_at":"2026-06-04T12:55:00Z"},{"value":"0.00088","scoring_system":"epss","scoring_elements":"0.25274","published_at":"2026-06-05T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2022-45142"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-45142","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-45142"},{"reference_url":"https://www.openwall.com/lists/oss-security/2023/02/08/1","reference_id":"1","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-03-06T20:20:44Z/"}],"url":"https://www.openwall.com/lists/oss-security/2023/02/08/1"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1030849","reference_id":"1030849","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1030849"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=2166672","reference_id":"2166672","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2166672"},{"reference_url":"https://security.gentoo.org/glsa/202310-06","reference_id":"GLSA-202310-06","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-03-06T20:20:44Z/"}],"url":"https://security.gentoo.org/glsa/202310-06"},{"reference_url":"https://usn.ubuntu.com/5849-1/","reference_id":"USN-5849-1","reference_type":"","scores":[],"url":"https://usn.ubuntu.com/5849-1/"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/313698?format=json","purl":"pkg:apk/alpine/heimdal@7.7.1-r0?arch=aarch64&distroversion=v3.16&reponame=main","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:apk/alpine/heimdal@7.7.1-r0%3Farch=aarch64&distroversion=v3.16&reponame=main"}],"aliases":["CVE-2022-45142"],"risk_score":null,"exploitability":null,"weighted_severity":null,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-qc3q-ht1m-aqdx"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/72444?format=json","vulnerability_id":"VCID-r3n1-q8uv-cfbb","summary":"All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11 and 4.11.x before 4.11.3 have an issue, where the S4U (MS-SFU) Kerberos delegation model includes a feature allowing for a subset of clients to be opted out of constrained delegation in any way, either S4U2Self or regular Kerberos authentication, by forcing all tickets for these clients to be non-forwardable. In AD this is implemented by a user attribute delegation_not_allowed (aka not-delegated), which translates to disallow-forwardable. However the Samba AD DC does not do that for S4U2Self and does set the forwardable flag even if the impersonated client has the not-delegated flag 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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.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2022-41916","reference_id":"","reference_type":"","scores":[{"value":"0.00322","scoring_system":"epss","scoring_elements":"0.55589","published_at":"2026-06-04T12:55:00Z"},{"value":"0.00322","scoring_system":"epss","scoring_elements":"0.55645","published_at":"2026-06-05T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2022-41916"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3671","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3671"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44758","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44758"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-3437","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-3437"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-41916","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-41916"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-42898","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-42898"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-44640","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-44640"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1024187","reference_id":"1024187","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1024187"},{"reference_url":"https://www.debian.org/security/2022/dsa-5287","reference_id":"dsa-5287","reference_type":"","scores":[{"value":"5.9","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-23T13:54:33Z/"}],"url":"https://www.debian.org/security/2022/dsa-5287"},{"reference_url":"https://github.com/heimdal/heimdal/security/advisories/GHSA-mgqr-gvh6-23cx","reference_id":"GHSA-mgqr-gvh6-23cx","reference_type":"","scores":[{"value":"5.9","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-23T13:54:33Z/"}],"url":"https://github.com/heimdal/heimdal/security/advisories/GHSA-mgqr-gvh6-23cx"},{"reference_url":"https://security.gentoo.org/glsa/202310-06","reference_id":"GLSA-202310-06","reference_type":"","scores":[{"value":"5.9","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-23T13:54:33Z/"}],"url":"https://security.gentoo.org/glsa/202310-06"},{"reference_url":"https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html","reference_id":"msg00034.html","reference_type":"","scores":[{"value":"5.9","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-23T13:54:33Z/"}],"url":"https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html"},{"reference_url":"https://security.netapp.com/advisory/ntap-20230216-0008/","reference_id":"ntap-20230216-0008","reference_type":"","scores":[{"value":"5.9","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-23T13:54:33Z/"}],"url":"https://security.netapp.com/advisory/ntap-20230216-0008/"},{"reference_url":"https://usn.ubuntu.com/5766-1/","reference_id":"USN-5766-1","reference_type":"","scores":[],"url":"https://usn.ubuntu.com/5766-1/"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/313698?format=json","purl":"pkg:apk/alpine/heimdal@7.7.1-r0?arch=aarch64&distroversion=v3.16&reponame=main","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:apk/alpine/heimdal@7.7.1-r0%3Farch=aarch64&distroversion=v3.16&reponame=main"}],"aliases":["CVE-2022-41916"],"risk_score":null,"exploitability":null,"weighted_severity":null,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-x8wd-mfqy-tfd3"}],"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/packages/pkg:apk/alpine/heimdal@7.7.1-r0%3Farch=aarch64&distroversion=v3.16&reponame=main"}