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Starting in version 2.0.0 and prior to version 2.4.6, CUPS logs data of free memory to the logging service AFTER the connection has been closed, when it should have logged the data right before. This is a use-after-free bug that impacts the entire cupsd process.\n\nThe exact cause of this issue is the function `httpClose(con->http)` being called in `scheduler/client.c`. The problem is that httpClose always, provided its argument is not null, frees the pointer at the end of the call, only for cupsdLogClient to pass the pointer to httpGetHostname. This issue happens in function `cupsdAcceptClient` if LogLevel is warn or higher and in two scenarios: there is a double-lookup for the IP Address (HostNameLookups Double is set in `cupsd.conf`) which fails to resolve, or if CUPS is compiled with TCP wrappers and the connection is refused by rules from `/etc/hosts.allow` and `/etc/hosts.deny`.\n\nVersion 2.4.6 has a patch for this issue."}], "source": {"advisory": "GHSA-qjgh-5hcq-5f25", "discovery": "UNKNOWN"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T16:01:54.315Z"}, "title": "CVE Program Container", "references": [{"name": "https://github.com/OpenPrinting/cups/security/advisories/GHSA-qjgh-5hcq-5f25", "tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/OpenPrinting/cups/security/advisories/GHSA-qjgh-5hcq-5f25"}, {"name": "https://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2", "tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2"}, {"name": "https://github.com/OpenPrinting/cups/releases/tag/v2.4.6", "tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/OpenPrinting/cups/releases/tag/v2.4.6"}, {"url": "http://www.openwall.com/lists/oss-security/2023/06/23/10", "tags": ["x_transferred"]}, {"url": "http://www.openwall.com/lists/oss-security/2023/06/26/1", "tags": ["x_transferred"]}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TBIYKDS3UG3W4Z7YOHTR2AWFNBRYPNYY/", "tags": ["x_transferred"]}, {"url": "https://lists.debian.org/debian-lts-announce/2023/06/msg00038.html", "tags": ["x_transferred"]}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7I7DWGYGEMBNLZF5UQBMF3SONR37YUBN/", "tags": ["x_transferred"]}, {"url": "https://support.apple.com/kb/HT213843", "tags": ["x_transferred"]}, {"url": "https://support.apple.com/kb/HT213844", "tags": ["x_transferred"]}, {"url": "https://support.apple.com/kb/HT213845", "tags": ["x_transferred"]}]}]}}

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This issue happens in function `cupsdAcceptClient` if LogLevel is warn or higher and in two scenarios: there is a double-lookup for the IP Address (HostNameLookups Double is set in `cupsd.conf`) which fails to resolve, or if CUPS is compiled with TCP wrappers and the connection is refused by rules from `/etc/hosts.allow` and `/etc/hosts.deny`.\n\nVersion 2.4.6 has a patch for this issue."}], "id": "CVE-2023-34241", "lastModified": "2023-11-17T19:33:17.840", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2023-06-22T23:15:09.493", "references": [{"source": "security-advisories@github.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2023/06/23/10"}, {"source": "security-advisories@github.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2023/06/26/1"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/OpenPrinting/cups/releases/tag/v2.4.6"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Patch", "Vendor Advisory"], "url": "https://github.com/OpenPrinting/cups/security/advisories/GHSA-qjgh-5hcq-5f25"}, {"source": "security-advisories@github.com", "tags": ["Mailing List"], "url": "https://lists.debian.org/debian-lts-announce/2023/06/msg00038.html"}, {"source": "security-advisories@github.com", "tags": ["Mailing List"], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7I7DWGYGEMBNLZF5UQBMF3SONR37YUBN/"}, {"source": "security-advisories@github.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TBIYKDS3UG3W4Z7YOHTR2AWFNBRYPNYY/"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://support.apple.com/kb/HT213843"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://support.apple.com/kb/HT213844"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://support.apple.com/kb/HT213845"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2023:7165", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "cups-1:2.2.6-54.el8_9", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-11-14T00:00:00Z"}, {"advisory": "RHSA-2023:7165", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "cups-1:2.2.6-54.el8_9", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-11-14T00:00:00Z"}, {"advisory": "RHSA-2024:1101", "cpe": "cpe:/a:redhat:rhel_eus:8.6", "package": "cups-1:2.2.6-45.el8_6.4", "product_name": "Red Hat Enterprise Linux 8.6 Extended Update Support", "release_date": "2024-03-05T00:00:00Z"}, {"advisory": "RHSA-2024:1409", "cpe": "cpe:/a:redhat:rhel_eus:8.8", "package": "cups-1:2.2.6-51.el8_8.3", "product_name": "Red Hat Enterprise Linux 8.8 Extended Update Support", "release_date": "2024-03-19T00:00:00Z"}, {"advisory": "RHSA-2023:6596", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "cups-1:2.3.3op2-21.el9", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-11-07T00:00:00Z"}, {"advisory": "RHSA-2023:6596", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "cups-1:2.3.3op2-21.el9", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-11-07T00:00:00Z"}], "bugzilla": {"description": "cups: use-after-free in cupsdAcceptClient() in scheduler/client.c", "id": "2214914", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2214914"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["OpenPrinting CUPS is a standards-based, open source printing system for Linux and other Unix-like operating systems. Starting in version 2.0.0 and prior to version 2.4.6, CUPS logs data of free memory to the logging service AFTER the connection has been closed, when it should have logged the data right before. This is a use-after-free bug that impacts the entire cupsd process.\nThe exact cause of this issue is the function `httpClose(con->http)` being called in `scheduler/client.c`. The problem is that httpClose always, provided its argument is not null, frees the pointer at the end of the call, only for cupsdLogClient to pass the pointer to httpGetHostname. This issue happens in function `cupsdAcceptClient` if LogLevel is warn or higher and in two scenarios: there is a double-lookup for the IP Address (HostNameLookups Double is set in `cupsd.conf`) which fails to resolve, or if CUPS is compiled with TCP wrappers and the connection is refused by rules from `/etc/hosts.allow` and `/etc/hosts.deny`.\nVersion 2.4.6 has a patch for this issue.", "A vulnerability was found in CUPS. This issue occurs due to logging data of free memory to the logging service AFTER the connection has been closed, when it should have logged the data immediately before the connection closed, resulting in a use-after-free in cupsdAcceptClient() in scheduler/client.c"], "name": "CVE-2023-34241", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "cups", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "cups", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2023-06-22T11:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-34241\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-34241"], "threat_severity": "Moderate"}