{"id":"CVE-2019-20908","state":"PUBLISHED","title":"An issue was discovered in drivers/firmware/efi/efi.c in the Linux kernel before 5.4. Incorrect access permissions for the efivar_ssdt ACPI variable could be used by attackers to b","description":"An issue was discovered in drivers/firmware/efi/efi.c in the Linux kernel before 5.4. Incorrect access permissions for the efivar_ssdt ACPI variable could be used by attackers to bypass lockdown or secure boot restrictions, aka CID-1957a85b0032.","publishedAt":"2020-07-15T21:24:27.000Z","updatedAt":"2024-08-05T02:53:09.612Z","severity":null,"assigner":"mitre","products":["n/a n/a"],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":["https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh","https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html","https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e","https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4","http://www.openwall.com/lists/oss-security/2020/07/20/6","https://usn.ubuntu.com/4427-1/","http://www.openwall.com/lists/oss-security/2020/07/29/3","http://www.openwall.com/lists/oss-security/2020/07/30/3","http://www.openwall.com/lists/oss-security/2020/07/30/2","https://usn.ubuntu.com/4439-1/","https://usn.ubuntu.com/4426-1/","https://usn.ubuntu.com/4440-1/","http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html"],"weaknesses":[],"ingestedAt":"2026-10-29T19:45:50.141Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2019/20xxx/CVE-2019-20908.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2019-20908","state":"PUBLISHED","datePublished":"2020-07-15T21:24:27.000Z","dateUpdated":"2024-08-05T02:53:09.612Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2020-07-15T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"An issue was discovered in drivers/firmware/efi/efi.c in the Linux kernel before 5.4. Incorrect access permissions for the efivar_ssdt ACPI variable could be used by attackers to bypass lockdown or secure boot restrictions, aka CID-1957a85b0032."}],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":[{"url":"https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh","tags":["x_refsource_MISC"]},{"url":"https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html","tags":["x_refsource_MISC"]},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e","tags":["x_refsource_MISC"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4","tags":["x_refsource_MISC"]},{"url":"http://www.openwall.com/lists/oss-security/2020/07/20/6","name":"[oss-security] 20200720 Re: Re: lockdown bypass on ubuntu 18.04's 4.15 kernel for loading unsigned modules","tags":["mailing-list","x_refsource_MLIST"]},{"url":"https://usn.ubuntu.com/4427-1/","name":"USN-4427-1","tags":["vendor-advisory","x_refsource_UBUNTU"]},{"url":"http://www.openwall.com/lists/oss-security/2020/07/29/3","name":"[oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilities","tags":["mailing-list","x_refsource_MLIST"]},{"url":"http://www.openwall.com/lists/oss-security/2020/07/30/3","name":"[oss-security] 20200730 Re: UEFI SecureBoot bypass fixes rolled out to kernels below radar","tags":["mailing-list","x_refsource_MLIST"]},{"url":"http://www.openwall.com/lists/oss-security/2020/07/30/2","name":"[oss-security] 20200730 UEFI SecureBoot bypass fixes rolled out to kernels below radar","tags":["mailing-list","x_refsource_MLIST"]},{"url":"https://usn.ubuntu.com/4439-1/","name":"USN-4439-1","tags":["vendor-advisory","x_refsource_UBUNTU"]},{"url":"https://usn.ubuntu.com/4426-1/","name":"USN-4426-1","tags":["vendor-advisory","x_refsource_UBUNTU"]},{"url":"https://usn.ubuntu.com/4440-1/","name":"USN-4440-1","tags":["vendor-advisory","x_refsource_UBUNTU"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html","name":"openSUSE-SU-2020:1153","tags":["vendor-advisory","x_refsource_SUSE"]}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"shortName":"mitre","dateUpdated":"2020-08-06T17:06:18.000Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2019-20908","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"An issue was discovered in drivers/firmware/efi/efi.c in the Linux kernel before 5.4. Incorrect access permissions for the efivar_ssdt ACPI variable could be used by attackers to bypass lockdown or secure boot restrictions, aka CID-1957a85b0032."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh","refsource":"MISC","url":"https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh"},{"name":"https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html","refsource":"MISC","url":"https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html"},{"name":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e","refsource":"MISC","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e"},{"name":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4","refsource":"MISC","url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4"},{"name":"[oss-security] 20200720 Re: Re: lockdown bypass on ubuntu 18.04's 4.15 kernel for loading unsigned modules","refsource":"MLIST","url":"http://www.openwall.com/lists/oss-security/2020/07/20/6"},{"name":"USN-4427-1","refsource":"UBUNTU","url":"https://usn.ubuntu.com/4427-1/"},{"name":"[oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilities","refsource":"MLIST","url":"http://www.openwall.com/lists/oss-security/2020/07/29/3"},{"name":"[oss-security] 20200730 Re: UEFI SecureBoot bypass fixes rolled out to kernels below radar","refsource":"MLIST","url":"http://www.openwall.com/lists/oss-security/2020/07/30/3"},{"name":"[oss-security] 20200730 UEFI SecureBoot bypass fixes rolled out to kernels below radar","refsource":"MLIST","url":"http://www.openwall.com/lists/oss-security/2020/07/30/2"},{"name":"USN-4439-1","refsource":"UBUNTU","url":"https://usn.ubuntu.com/4439-1/"},{"name":"USN-4426-1","refsource":"UBUNTU","url":"https://usn.ubuntu.com/4426-1/"},{"name":"USN-4440-1","refsource":"UBUNTU","url":"https://usn.ubuntu.com/4440-1/"},{"name":"openSUSE-SU-2020:1153","refsource":"SUSE","url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://www.openwall.com/lists/oss-security/2020/07/20/6","name":"[oss-security] 20200720 Re: Re: lockdown bypass on ubuntu 18.04's 4.15 kernel for loading unsigned modules","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"https://usn.ubuntu.com/4427-1/","name":"USN-4427-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred"]},{"url":"http://www.openwall.com/lists/oss-security/2020/07/29/3","name":"[oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilities","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"http://www.openwall.com/lists/oss-security/2020/07/30/3","name":"[oss-security] 20200730 Re: UEFI SecureBoot bypass fixes rolled out to kernels below radar","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"http://www.openwall.com/lists/oss-security/2020/07/30/2","name":"[oss-security] 20200730 UEFI SecureBoot bypass fixes rolled out to kernels below radar","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"https://usn.ubuntu.com/4439-1/","name":"USN-4439-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred"]},{"url":"https://usn.ubuntu.com/4426-1/","name":"USN-4426-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred"]},{"url":"https://usn.ubuntu.com/4440-1/","name":"USN-4440-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html","name":"openSUSE-SU-2020:1153","tags":["vendor-advisory","x_refsource_SUSE","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-05T02:53:09.612Z"}}]}}}