{"url":"http://public2.vulnerablecode.io/api/packages/1038088?format=json","purl":"pkg:deb/debian/c-ares@1.12.0-1%2Bdeb9u1","type":"deb","namespace":"debian","name":"c-ares","version":"1.12.0-1+deb9u1","qualifiers":{},"subpath":"","is_vulnerable":true,"next_non_vulnerable_version":"1.34.5-1+deb13u1","latest_non_vulnerable_version":"1.34.5-1+deb13u1","affected_by_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/11629?format=json","vulnerability_id":"VCID-1xdz-dku3-qqc4","summary":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\nA flaw was found in c-ares library, where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3672.json","reference_id":"","reference_type":"","scores":[{"value":"5.6","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3672.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2021-3672","reference_id":"","reference_type":"","scores":[{"value":"0.00055","scoring_system":"epss","scoring_elements":"0.17144","published_at":"2026-04-01T12:55:00Z"},{"value":"0.00055","scoring_system":"epss","scoring_elements":"0.17157","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00055","scoring_system":"epss","scoring_elements":"0.1731","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00055","scoring_system":"epss","scoring_elements":"0.17358","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00055","scoring_system":"epss","scoring_elements":"0.17138","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00055","scoring_system":"epss","scoring_elements":"0.17229","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00055","scoring_system":"epss","scoring_elements":"0.17287","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00055","scoring_system":"epss","scoring_elements":"0.17265","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00055","scoring_system":"epss","scoring_elements":"0.17216","published_at":"2026-04-12T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2021-3672"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=1988342","reference_id":"","reference_type":"","scores":[{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-10-15T17:09:33Z/"}],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1988342"},{"reference_url":"https://c-ares.haxx.se/adv_20210810.html","reference_id":"","reference_type":"","scores":[{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-10-15T17:09:33Z/"}],"url":"https://c-ares.haxx.se/adv_20210810.html"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3672","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3672"},{"reference_url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml","reference_id":"","reference_type":"","scores":[{"value":"8.1","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=992053","reference_id":"992053","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=992053"},{"reference_url":"https://security.archlinux.org/ASA-202108-13","reference_id":"ASA-202108-13","reference_type":"","scores":[],"url":"https://security.archlinux.org/ASA-202108-13"},{"reference_url":"https://security.archlinux.org/AVG-2268","reference_id":"AVG-2268","reference_type":"","scores":[{"value":"Medium","scoring_system":"archlinux","scoring_elements":""}],"url":"https://security.archlinux.org/AVG-2268"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3672","reference_id":"CVE-2021-3672","reference_type":"","scores":[],"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3672"},{"reference_url":"https://security.gentoo.org/glsa/202401-02","reference_id":"GLSA-202401-02","reference_type":"","scores":[{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-10-15T17:09:33Z/"}],"url":"https://security.gentoo.org/glsa/202401-02"},{"reference_url":"https://security.gentoo.org/glsa/202405-29","reference_id":"GLSA-202405-29","reference_type":"","scores":[],"url":"https://security.gentoo.org/glsa/202405-29"},{"reference_url":"https://access.redhat.com/errata/RHSA-2021:3280","reference_id":"RHSA-2021:3280","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2021:3280"},{"reference_url":"https://access.redhat.com/errata/RHSA-2021:3281","reference_id":"RHSA-2021:3281","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2021:3281"},{"reference_url":"https://access.redhat.com/errata/RHSA-2021:3623","reference_id":"RHSA-2021:3623","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2021:3623"},{"reference_url":"https://access.redhat.com/errata/RHSA-2021:3638","reference_id":"RHSA-2021:3638","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2021:3638"},{"reference_url":"https://access.redhat.com/errata/RHSA-2021:3639","reference_id":"RHSA-2021:3639","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2021:3639"},{"reference_url":"https://access.redhat.com/errata/RHSA-2021:3666","reference_id":"RHSA-2021:3666","reference_type":"","scores":[],"url":"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Input Validation\nA flaw was found in the c-ares package. The ares_set_sortlist is missing checks about the validity of the input string, which allows a possible arbitrary length stack overflow. This issue may cause a denial of service or a limited impact on confidentiality and integrity.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2022-4904.json","reference_id":"","reference_type":"","scores":[{"value":"8.6","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2022-4904.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2022-4904","reference_id":"","reference_type":"","scores":[{"value":"0.00161","scoring_system":"epss","scoring_elements":"0.37124","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00161","scoring_system":"epss","scoring_elements":"0.36999","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00161","scoring_system":"epss","scoring_elements":"0.37156","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00161","scoring_system":"epss","scoring_elements":"0.36987","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00161","scoring_system":"epss","scoring_elements":"0.37037","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00161","scoring_system":"epss","scoring_elements":"0.3705","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00161","scoring_system":"epss","scoring_elements":"0.37059","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00161","scoring_system":"epss","scoring_elements":"0.37025","published_at":"2026-04-12T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2022-4904"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=2168631","reference_id":"","reference_type":"","scores":[{"value":"8.6","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-12-02T20:25:39Z/"}],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2168631"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-4904","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-4904"},{"reference_url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml","reference_id":"","reference_type":"","scores":[{"value":"6.9","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://github.com/c-ares/c-ares/issues/496","reference_id":"","reference_type":"","scores":[{"value":"8.6","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-12-02T20:25:39Z/"}],"url":"https://github.com/c-ares/c-ares/issues/496"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/33LDNS6RPOPP36Z4MPWXALUQZXJCWJS2/","reference_id":"","reference_type":"","scores":[],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/33LDNS6RPOPP36Z4MPWXALUQZXJCWJS2/"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1031525","reference_id":"1031525","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1031525"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/33LDNS6RPOPP36Z4MPWXALUQZXJCWJS2/","reference_id":"33LDNS6RPOPP36Z4MPWXALUQZXJCWJS2","reference_type":"","scores":[{"value":"8.6","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-12-02T20:25:39Z/"}],"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/33LDNS6RPOPP36Z4MPWXALUQZXJCWJS2/"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2022-4904","reference_id":"CVE-2022-4904","reference_type":"","scores":[],"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-4904"},{"reference_url":"https://security.gentoo.org/glsa/202401-02","reference_id":"GLSA-202401-02","reference_type":"","scores":[{"value":"8.6","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-12-02T20:25:39Z/"}],"url":"https://security.gentoo.org/glsa/202401-02"},{"reference_url":"https://access.redhat.com/errata/RHSA-2023:1533","reference_id":"RHSA-2023:1533","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2023:1533"},{"reference_url":"https://access.redhat.com/errata/RHSA-2023:1582","reference_id":"RHSA-2023:1582","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2023:1582"},{"reference_url":"https://access.redhat.com/errata/RHSA-2023:1742","reference_id":"RHSA-2023:1742","reference_type":"","scores":[],"ur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Denial of Service vulnerability was discovered in 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Underwrite ('Buffer Underflow')\nc-ares is an asynchronous resolver library. ares_inet_net_pton() is vulnerable to a buffer underflow for certain ipv6 addresses, in particular \"0::00:00:00/2\" was found to cause an issue. C-ares only uses this function internally for configuration purposes which would require an administrator to configure such an address via ares_set_sortlist(). However, users may externally use ares_inet_net_pton() for other purposes and thus be vulnerable to more severe issues. This issue has been fixed in 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