CVE-2023-34241 (GCVE-0-2023-34241)

Vulnerability from cvelistv5 – Published: 2023-06-22 22:39 – Updated: 2025-02-13 16:55
VLAI
Title
CUPS vulnerable to use-after-free in cupsdAcceptClient()
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.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
OpenPrinting cups Affected: >= 2.0.0, < 2.4.6
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      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://github.com/OpenPrinting/cups/security/advisories/GHSA-qjgh-5hcq-5f25\", \"name\": \"https://github.com/OpenPrinting/cups/security/advisories/GHSA-qjgh-5hcq-5f25\", \"tags\": [\"x_refsource_CONFIRM\", \"x_transferred\"]}, {\"url\": \"https://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2\", \"name\": \"https://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}, {\"url\": \"https://github.com/OpenPrinting/cups/releases/tag/v2.4.6\", \"name\": \"https://github.com/OpenPrinting/cups/releases/tag/v2.4.6\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}, {\"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\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T16:01:54.315Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-34241\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-12-10T20:49:43.499652Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-12-10T20:49:48.012Z\"}}], \"cna\": {\"title\": \"CUPS vulnerable to use-after-free in cupsdAcceptClient()\", \"source\": {\"advisory\": \"GHSA-qjgh-5hcq-5f25\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"OpenPrinting\", \"product\": \"cups\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 2.0.0, \u003c 2.4.6\"}]}], \"references\": [{\"url\": \"https://github.com/OpenPrinting/cups/security/advisories/GHSA-qjgh-5hcq-5f25\", \"name\": \"https://github.com/OpenPrinting/cups/security/advisories/GHSA-qjgh-5hcq-5f25\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2\", \"name\": \"https://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/OpenPrinting/cups/releases/tag/v2.4.6\", \"name\": \"https://github.com/OpenPrinting/cups/releases/tag/v2.4.6\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/06/23/10\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/06/26/1\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TBIYKDS3UG3W4Z7YOHTR2AWFNBRYPNYY/\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2023/06/msg00038.html\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7I7DWGYGEMBNLZF5UQBMF3SONR37YUBN/\"}, {\"url\": \"https://support.apple.com/kb/HT213843\"}, {\"url\": \"https://support.apple.com/kb/HT213844\"}, {\"url\": \"https://support.apple.com/kb/HT213845\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\\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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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.