CVE-2023-34241 (GCVE-0-2023-34241)
Vulnerability from cvelistv5
Published
2023-06-22 22:39
Modified
2025-02-13 16:55
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE
Summary
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. The 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`. Version 2.4.6 has a patch for this issue.
References
security-advisories@github.com http://www.openwall.com/lists/oss-security/2023/06/23/10 Mailing List, Third Party Advisory
security-advisories@github.com http://www.openwall.com/lists/oss-security/2023/06/26/1 Mailing List, Third Party Advisory
security-advisories@github.com https://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2 Patch
security-advisories@github.com https://github.com/OpenPrinting/cups/releases/tag/v2.4.6 Release Notes
security-advisories@github.com https://github.com/OpenPrinting/cups/security/advisories/GHSA-qjgh-5hcq-5f25 Exploit, Patch, Vendor Advisory
security-advisories@github.com https://lists.debian.org/debian-lts-announce/2023/06/msg00038.html Mailing List
security-advisories@github.com https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7I7DWGYGEMBNLZF5UQBMF3SONR37YUBN/ Mailing List
security-advisories@github.com https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TBIYKDS3UG3W4Z7YOHTR2AWFNBRYPNYY/ Mailing List, Third Party Advisory
security-advisories@github.com https://support.apple.com/kb/HT213843 Third Party Advisory
security-advisories@github.com https://support.apple.com/kb/HT213844 Third Party Advisory
security-advisories@github.com https://support.apple.com/kb/HT213845 Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2023/06/23/10 Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2023/06/26/1 Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2 Patch
af854a3a-2127-422b-91ae-364da2661108 https://github.com/OpenPrinting/cups/releases/tag/v2.4.6 Release Notes
af854a3a-2127-422b-91ae-364da2661108 https://github.com/OpenPrinting/cups/security/advisories/GHSA-qjgh-5hcq-5f25 Exploit, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 https://lists.debian.org/debian-lts-announce/2023/06/msg00038.html Mailing List
af854a3a-2127-422b-91ae-364da2661108 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7I7DWGYGEMBNLZF5UQBMF3SONR37YUBN/ Mailing List
af854a3a-2127-422b-91ae-364da2661108 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TBIYKDS3UG3W4Z7YOHTR2AWFNBRYPNYY/ Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://support.apple.com/kb/HT213843 Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://support.apple.com/kb/HT213844 Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://support.apple.com/kb/HT213845 Third Party Advisory
Impacted products
Vendor Product Version
OpenPrinting cups Version: >= 2.0.0, < 2.4.6
 Create a notification for this product.
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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-\u003ehttp)` 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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416: Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2023-07-28T20:06:34.910Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-34241\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-02-13T16:55:24.787Z\", \"dateReserved\": \"2023-05-31T13:51:51.171Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2023-06-22T22:39:32.400Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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