CVE-2021-23133 (GCVE-0-2021-23133)
Vulnerability from cvelistv5
Published
2021-04-22 18:00
Modified
2024-09-16 19:04
Severity ?
6.7 (Medium) - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-362 - Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)
Summary
A race condition in Linux kernel SCTP sockets (net/sctp/socket.c) before 5.12-rc8 can lead to kernel privilege escalation from the context of a network service or an unprivileged process. If sctp_destroy_sock is called without sock_net(sk)->sctp.addr_wq_lock then an element is removed from the auto_asconf_splist list without any proper locking. This can be exploited by an attacker with network service privileges to escalate to root or from the context of an unprivileged user directly if a BPF_CGROUP_INET_SOCK_CREATE is attached which denies creation of some SCTP socket.
References
psirt@paloaltonetworks.com http://www.openwall.com/lists/oss-security/2021/05/10/1 Mailing List, Patch, Third Party Advisory
psirt@paloaltonetworks.com http://www.openwall.com/lists/oss-security/2021/05/10/2 Mailing List, Patch, Third Party Advisory
psirt@paloaltonetworks.com http://www.openwall.com/lists/oss-security/2021/05/10/3 Mailing List, Patch, Third Party Advisory
psirt@paloaltonetworks.com http://www.openwall.com/lists/oss-security/2021/05/10/4 Mailing List, Patch, Third Party Advisory
psirt@paloaltonetworks.com https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b166a20b07382b8bc1dcee2a448715c9c2c81b5b Mailing List, Patch, Vendor Advisory
psirt@paloaltonetworks.com https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html Mitigation, Third Party Advisory
psirt@paloaltonetworks.com https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html Mitigation, Third Party Advisory
psirt@paloaltonetworks.com https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CUX2CA63453G34C6KYVBLJXJXEARZI2X/
psirt@paloaltonetworks.com https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAEQ3H6HKNO6KUCGRZVYSFSAGEUX23JL/
psirt@paloaltonetworks.com https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XZASHZVCOFJ4VU2I3BN5W5EPHWJQ7QWX/
psirt@paloaltonetworks.com https://security.netapp.com/advisory/ntap-20210611-0008/ Third Party Advisory
psirt@paloaltonetworks.com https://www.openwall.com/lists/oss-security/2021/04/18/2 Exploit, Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2021/05/10/1 Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2021/05/10/2 Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2021/05/10/3 Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2021/05/10/4 Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b166a20b07382b8bc1dcee2a448715c9c2c81b5b Mailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html Mitigation, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html Mitigation, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CUX2CA63453G34C6KYVBLJXJXEARZI2X/
af854a3a-2127-422b-91ae-364da2661108 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAEQ3H6HKNO6KUCGRZVYSFSAGEUX23JL/
af854a3a-2127-422b-91ae-364da2661108 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XZASHZVCOFJ4VU2I3BN5W5EPHWJQ7QWX/
af854a3a-2127-422b-91ae-364da2661108 https://security.netapp.com/advisory/ntap-20210611-0008/ Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://www.openwall.com/lists/oss-security/2021/04/18/2 Exploit, Mailing List, Patch, Third Party Advisory
Impacted products
Vendor Product Version
Linux Kernel Linux Kernel Version: unspecified   < 5.12-rc8
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This can be exploited by an attacker with network service privileges to escalate to root or from the context of an unprivileged user directly if a BPF_CGROUP_INET_SOCK_CREATE is attached which denies creation of some SCTP socket.\"},{\"lang\":\"es\",\"value\":\"Una condici\u00f3n de carrera en los sockets SCTP del kernel de Linux (el archivo net/sctp/socket.c) versiones anteriores a 5.12-rc8, puede conllevar a una escalada de privilegios del kernel desde el contexto de un servicio de red o un proceso no privilegiado.\u0026#xa0;Si la funci\u00f3n sctp_destroy_sock es llamado sin sock_net (sk) -) sctp.addr_wq_lock, un elemento es eliminado de la lista auto_asconf_splist sin ning\u00fan bloqueo apropiado.\u0026#xa0;Esto puede ser explotado por un atacante con privilegios de servicio de red para escalar a root o desde el contexto de un usuario no privilegiado directamente si un  BPF_CGROUP_INET_SOCK_CREATE es adjuntado que niega la creaci\u00f3n de alg\u00fan socket SCTP\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"psirt@paloaltonetworks.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":6.7,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":0.8,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.0,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.0,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:M/Au:N/C:C/I:C/A:C\",\"baseScore\":6.9,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"COMPLETE\",\"integrityImpact\":\"COMPLETE\",\"availabilityImpact\":\"COMPLETE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":3.4,\"impactScore\":10.0,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"psirt@paloaltonetworks.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-362\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-362\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.10\",\"versionEndExcluding\":\"4.14.232\",\"matchCriteriaId\":\"AA37000C-4A14-43C9-85B7-38769DC96041\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.189\",\"matchCriteriaId\":\"DCCA659A-B6C8-4D6E-9598-364709A6D261\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.114\",\"matchCriteriaId\":\"997A4C67-E4A2-4FCD-A826-F74DB7AD54CA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.32\",\"matchCriteriaId\":\"7219CE54-2A13-423E-915D-1D30ADB4BE87\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.11.16\",\"matchCriteriaId\":\"73E1B19B-5CED-4857-9364-96E77B8A8EAC\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"36D96259-24BD-44E2-96D9-78CE1D41F956\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E460AA51-FCDA-46B9-AE97-E6676AA5E194\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A930E247-0B43-43CB-98FF-6CE7B8189835\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"DEECE5FC-CACF-4496-A3E7-164736409252\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"5C2089EE-5D7F-47EC-8EA5-0F69790564C4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:netapp:solidfire_\\\\\u0026_hci_management_node:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D6D700C5-F67F-4FFB-BE69-D524592A3D2E\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:broadcom:brocade_fabric_operating_system:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"390BCCEF-BD91-426B-B89C-D9371A02FA9C\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"234DEFE0-5CE5-4B0A-96B8-5D227CB8ED31\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"CDDF61B7-EC5C-467C-B710-B89F502CD04F\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*\",\"matchCriteria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  }
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
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  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.