cve-2023-0045
Vulnerability from cvelistv5
Published
2023-04-25 22:44
Modified
2025-02-13 16:38
Severity ?
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Summary
The current implementation of the prctl syscall does not issue an IBPB immediately during the syscall. The ib_prctl_set  function updates the Thread Information Flags (TIFs) for the task and updates the SPEC_CTRL MSR on the function __speculation_ctrl_update, but the IBPB is only issued on the next schedule, when the TIF bits are checked. This leaves the victim vulnerable to values already injected on the BTB, prior to the prctl syscall.  The patch that added the support for the conditional mitigation via prctl (ib_prctl_set) dates back to the kernel 4.9.176. We recommend upgrading past commit a664ec9158eeddd75121d39c9a0758016097fa96
References
cve-coordination@google.comhttps://git.kernel.org/tip/a664ec9158eeddd75121d39c9a0758016097fa96Mailing List, Patch
cve-coordination@google.comhttps://github.com/google/security-research/security/advisories/GHSA-9x5g-vmxf-4qj8Exploit, Third Party Advisory
cve-coordination@google.comhttps://lists.debian.org/debian-lts-announce/2023/05/msg00005.htmlMailing List, Third Party Advisory
cve-coordination@google.comhttps://lists.debian.org/debian-lts-announce/2023/05/msg00006.htmlMailing List, Third Party Advisory
cve-coordination@google.comhttps://security.netapp.com/advisory/ntap-20230714-0001/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/tip/a664ec9158eeddd75121d39c9a0758016097fa96Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/google/security-research/security/advisories/GHSA-9x5g-vmxf-4qj8Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/05/msg00005.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/05/msg00006.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20230714-0001/Third Party Advisory
Impacted products
Vendor Product Version
Linux Linux Kernel Version: 9137bb27e60e
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      "containers": "{\"cna\": {\"affected\": [{\"defaultStatus\": \"unaffected\", \"packageName\": \"kernel\", \"product\": \"Linux Kernel\", \"repo\": \"https://git.kernel.org\", \"vendor\": \"Linux\", \"versions\": [{\"lessThan\": \"a664ec9158eeddd75121d39c9a0758016097fa96\", \"status\": \"affected\", \"version\": \"9137bb27e60e\", \"versionType\": \"git\"}]}], \"datePublic\": \"2023-01-02T23:00:00.000Z\", \"descriptions\": [{\"lang\": \"en\", \"supportingMedia\": [{\"base64\": false, \"type\": \"text/html\", \"value\": \"\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003eThe current implementation of the prctl syscall does not issue an IBPB immediately during the syscall. The ib_prctl_set \u0026nbsp;function updates the Thread Information Flags (TIFs) for the task and updates the SPEC_CTRL MSR on the function __speculation_ctrl_update, but the IBPB is only issued on the next schedule, when the TIF bits are checked. This leaves the victim vulnerable to values already injected on the BTB, prior to the prctl syscall. \u0026nbsp;The patch that added the support for the conditional mitigation via prctl (ib_prctl_set) dates back to the kernel 4.9.176.\u003cbr\u003e\u003cbr\u003e\u003c/span\u003eWe recommend upgrading past commit\u0026nbsp;a664ec9158eeddd75121d39c9a0758016097fa96\u003cbr\u003e\u003cbr\u003e\"}], \"value\": \"The current implementation of the prctl syscall does not issue an IBPB immediately during the syscall. The ib_prctl_set \\u00a0function updates the Thread Information Flags (TIFs) for the task and updates the SPEC_CTRL MSR on the function __speculation_ctrl_update, but the IBPB is only issued on the next schedule, when the TIF bits are checked. This leaves the victim vulnerable to values already injected on the BTB, prior to the prctl syscall. \\u00a0The patch that added the support for the conditional mitigation via prctl (ib_prctl_set) dates back to the kernel 4.9.176.\\n\\nWe recommend upgrading past commit\\u00a0a664ec9158eeddd75121d39c9a0758016097fa96\\n\\n\"}], \"impacts\": [{\"capecId\": \"CAPEC-131\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-131 Resource Leak Exposure\"}]}], \"metrics\": [{\"cvssV3_1\": {\"attackComplexity\": \"HIGH\", \"attackVector\": \"LOCAL\", \"availabilityImpact\": \"NONE\", \"baseScore\": 4.7, \"baseSeverity\": \"MEDIUM\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"NONE\", \"privilegesRequired\": \"LOW\", \"scope\": \"UNCHANGED\", \"userInteraction\": \"NONE\", \"vectorString\": \"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N\", \"version\": \"3.1\"}, \"format\": \"CVSS\", \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-610\", \"description\": \"CWE-610 Externally Controlled Reference to a Resource in Another Sphere\", \"lang\": \"en\", \"type\": \"CWE\"}]}], \"providerMetadata\": {\"orgId\": \"14ed7db2-1595-443d-9d34-6215bf890778\", \"shortName\": \"Google\", \"dateUpdated\": \"2023-04-25T22:44:57.262Z\"}, \"references\": [{\"url\": \"https://git.kernel.org/tip/a664ec9158eeddd75121d39c9a0758016097fa96\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20230714-0001/\"}, {\"url\": \"https://github.com/google/security-research/security/advisories/GHSA-9x5g-vmxf-4qj8\"}], \"source\": {\"discovery\": \"EXTERNAL\"}, \"title\": \"Incorrect indirect branch prediction barrier in the Linux Kernel \", \"x_generator\": {\"engine\": \"Vulnogram 0.1.0-dev\"}}, \"adp\": [{\"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T04:54:32.575Z\"}, \"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/tip/a664ec9158eeddd75121d39c9a0758016097fa96\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20230714-0001/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.com/google/security-research/security/advisories/GHSA-9x5g-vmxf-4qj8\", \"tags\": [\"x_transferred\"]}]}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-0045\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-02-03T17:52:12.098510Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-02-03T17:51:48.663Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-0045\", \"assignerOrgId\": \"14ed7db2-1595-443d-9d34-6215bf890778\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"Google\", \"dateReserved\": \"2023-01-04T10:07:20.469Z\", \"datePublished\": \"2023-04-25T22:44:57.262Z\", \"dateUpdated\": \"2025-02-03T17:52:16.463Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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