FKIE_CVE-2023-34241

Vulnerability from fkie_nvd - Published: 2023-06-22 23:15 - Updated: 2024-11-21 08:06
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
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.comhttp://www.openwall.com/lists/oss-security/2023/06/23/10Mailing List, Third Party Advisory
security-advisories@github.comhttp://www.openwall.com/lists/oss-security/2023/06/26/1Mailing List, Third Party Advisory
security-advisories@github.comhttps://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2Patch
security-advisories@github.comhttps://github.com/OpenPrinting/cups/releases/tag/v2.4.6Release Notes
security-advisories@github.comhttps://github.com/OpenPrinting/cups/security/advisories/GHSA-qjgh-5hcq-5f25Exploit, Patch, Vendor Advisory
security-advisories@github.comhttps://lists.debian.org/debian-lts-announce/2023/06/msg00038.htmlMailing List
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7I7DWGYGEMBNLZF5UQBMF3SONR37YUBN/Mailing List
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TBIYKDS3UG3W4Z7YOHTR2AWFNBRYPNYY/Mailing List, Third Party Advisory
security-advisories@github.comhttps://support.apple.com/kb/HT213843Third Party Advisory
security-advisories@github.comhttps://support.apple.com/kb/HT213844Third Party Advisory
security-advisories@github.comhttps://support.apple.com/kb/HT213845Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2023/06/23/10Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2023/06/26/1Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/OpenPrinting/cups/releases/tag/v2.4.6Release Notes
af854a3a-2127-422b-91ae-364da2661108https://github.com/OpenPrinting/cups/security/advisories/GHSA-qjgh-5hcq-5f25Exploit, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/06/msg00038.htmlMailing List
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7I7DWGYGEMBNLZF5UQBMF3SONR37YUBN/Mailing List
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TBIYKDS3UG3W4Z7YOHTR2AWFNBRYPNYY/Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT213843Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT213844Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT213845Third Party Advisory
Impacted products
Vendor Product Version
openprinting cups *
fedoraproject fedora 37
fedoraproject fedora 38
debian debian_linux 10.0
apple macos *
apple macos *
apple macos *
To clipboard 

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      "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."
    }
  ],
  "id": "CVE-2023-34241",
  "lastModified": "2024-11-21T08:06:50.577",
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}


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  • 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.
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  • 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.



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