gsd-2020-8835
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)
Aliases
Aliases
{ GSD: { alias: "CVE-2020-8835", description: "In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)", id: "GSD-2020-8835", references: [ "https://www.suse.com/security/cve/CVE-2020-8835.html", "https://ubuntu.com/security/CVE-2020-8835", "https://advisories.mageia.org/CVE-2020-8835.html", "https://security.archlinux.org/CVE-2020-8835", "https://linux.oracle.com/cve/CVE-2020-8835.html", ], }, gsd: { metadata: { exploitCode: "unknown", remediation: "unknown", reportConfidence: "confirmed", type: "vulnerability", }, osvSchema: { aliases: [ "CVE-2020-8835", ], details: "In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)", id: "GSD-2020-8835", modified: "2023-12-13T01:21:53.654322Z", schema_version: "1.4.0", }, }, namespaces: { "cve.org": { CVE_data_meta: { ASSIGNER: "security@ubuntu.com", DATE_PUBLIC: "2020-03-30T16:00:00.000Z", ID: "CVE-2020-8835", STATE: "PUBLIC", TITLE: "Linux kernel bpf verifier vulnerability", }, affects: { vendor: { vendor_data: [ { product: { product_data: [ { product_name: "Linux kernel", version: { version_data: [ { version_affected: "<", version_name: "5.6-stable", version_value: "5.6.1", }, { version_affected: "<", version_name: "5.5-stable", version_value: "5.5.14", }, { version_affected: ">=", version_name: "5.4-stable", version_value: "5.4.7", }, { version_affected: "<", version_name: "5.4-stable", version_value: "5.4.29", }, ], }, }, ], }, vendor_name: "Linux kernel", }, ], }, }, credit: [ { lang: "eng", value: "Manfred Paul", }, { lang: "eng", value: "Anatoly Trosinenko", }, ], data_format: "MITRE", data_type: "CVE", data_version: "4.0", description: { description_data: [ { lang: "eng", value: "In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)", }, ], }, generator: { engine: "Vulnogram 0.0.9", }, impact: { cvss: { attackComplexity: "HIGH", attackVector: "LOCAL", availabilityImpact: "HIGH", baseScore: 7.8, baseSeverity: "HIGH", confidentialityImpact: "HIGH", integrityImpact: "HIGH", privilegesRequired: "LOW", scope: "CHANGED", userInteraction: "NONE", vectorString: "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", version: "3.1", }, }, problemtype: { problemtype_data: [ { description: [ { lang: "eng", value: "n/a", }, ], }, ], }, references: { reference_data: [ { name: "USN-4313-1", refsource: "UBUNTU", url: "https://usn.ubuntu.com/4313-1/", }, { name: "https://www.thezdi.com/blog/2020/3/19/pwn2own-2020-day-one-results", refsource: "MISC", url: "https://www.thezdi.com/blog/2020/3/19/pwn2own-2020-day-one-results", }, { name: "https://lore.kernel.org/bpf/20200330160324.15259-1-daniel@iogearbox.net/T/", refsource: "MISC", url: "https://lore.kernel.org/bpf/20200330160324.15259-1-daniel@iogearbox.net/T/", }, { name: "https://www.openwall.com/lists/oss-security/2020/03/30/3", refsource: "MISC", url: "https://www.openwall.com/lists/oss-security/2020/03/30/3", }, { name: "https://usn.ubuntu.com/usn/usn-4313-1", refsource: "MISC", url: "https://usn.ubuntu.com/usn/usn-4313-1", }, { name: "https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef", refsource: "MISC", url: "https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef", }, { name: "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef", refsource: "MISC", url: "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef", }, { name: "FEDORA-2020-4ef0bcc89c", refsource: "FEDORA", url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F7OONYGMSYBEFHLHZJK3GOI5Z553G4LD/", }, { name: "FEDORA-2020-666f3b1ac3", refsource: "FEDORA", url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YXBWSHZ6DJIZVXKXGZPK6QPFCY7VKZEG/", }, { name: "FEDORA-2020-73c00eda1c", refsource: "FEDORA", url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TF4PQZBEPNXDSK5DOBMW54OCLP25FTCD/", }, { name: "https://security.netapp.com/advisory/ntap-20200430-0004/", refsource: "CONFIRM", url: "https://security.netapp.com/advisory/ntap-20200430-0004/", }, { name: "[oss-security] 20210720 CVE-2021-33909: size_t-to-int vulnerability in Linux's filesystem layer", refsource: "MLIST", url: "http://www.openwall.com/lists/oss-security/2021/07/20/1", }, ], }, solution: [ { lang: "eng", value: "Revert commit 581738a681b6 (\"bpf: Provide better register bounds after jmp32 instructions\").", }, ], source: { discovery: "EXTERNAL", }, work_around: [ { lang: "eng", value: "Mitigation for this vulnerability is available by setting the kernel.unprivileged_bpf_disabled sysctl to 1:\n\n $ sudo sysctl kernel.unprivileged_bpf_disabled=1\n $ echo kernel.unprivileged_bpf_disabled=1 | sudo tee /etc/sysctl.d/90-CVE-2020-8835.conf\n\nThis issue is also mitigated on systems that use secure boot with the kernel lockdown feature which blocks BPF program loading.", }, ], }, "nvd.nist.gov": { configurations: { CVE_data_version: "4.0", nodes: [ { children: [], cpe_match: [ { cpe23Uri: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", cpe_name: [], versionEndExcluding: "5.4.29", versionStartIncluding: "5.4.7", vulnerable: true, }, { cpe23Uri: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", cpe_name: [], versionEndExcluding: "5.5.14", versionStartIncluding: "5.5.0", vulnerable: true, }, { cpe23Uri: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", cpe_name: [], 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operator: "OR", }, ], cpe_match: [], operator: "AND", }, { children: [ { children: [], cpe_match: [ { cpe23Uri: "cpe:2.3:o:netapp:h610c_firmware:-:*:*:*:*:*:*:*", cpe_name: [], vulnerable: true, }, ], operator: "OR", }, { children: [], cpe_match: [ { cpe23Uri: "cpe:2.3:h:netapp:h610c:-:*:*:*:*:*:*:*", cpe_name: [], vulnerable: false, }, ], operator: "OR", }, ], cpe_match: [], operator: "AND", }, { children: [ { children: [], cpe_match: [ { cpe23Uri: "cpe:2.3:o:netapp:h610s_firmware:-:*:*:*:*:*:*:*", cpe_name: [], vulnerable: true, }, ], operator: "OR", }, { children: [], cpe_match: [ { cpe23Uri: "cpe:2.3:h:netapp:h610s:-:*:*:*:*:*:*:*", cpe_name: [], vulnerable: false, }, ], operator: "OR", }, ], cpe_match: [], operator: "AND", }, { children: [ { children: [], cpe_match: [ { cpe23Uri: "cpe:2.3:o:netapp:h615c_firmware:-:*:*:*:*:*:*:*", cpe_name: [], vulnerable: true, }, ], operator: "OR", }, { children: [], cpe_match: [ { cpe23Uri: "cpe:2.3:h:netapp:h615c:-:*:*:*:*:*:*:*", cpe_name: [], vulnerable: false, }, ], operator: "OR", }, ], cpe_match: [], operator: "AND", }, ], }, cve: { CVE_data_meta: { ASSIGNER: "security@ubuntu.com", ID: "CVE-2020-8835", }, data_format: "MITRE", data_type: "CVE", data_version: "4.0", description: { description_data: [ { lang: "en", value: "In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)", }, ], }, problemtype: { problemtype_data: [ { description: [ { lang: "en", value: "CWE-125", }, { lang: "en", value: "CWE-787", }, ], }, ], }, references: { reference_data: [ { name: "N/A", refsource: "CONFIRM", tags: [ "Mailing List", "Patch", "Third Party Advisory", ], url: "https://www.openwall.com/lists/oss-security/2020/03/30/3", }, { name: "N/A", refsource: "CONFIRM", tags: [ "Patch", "Vendor Advisory", ], url: "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef", }, { name: "N/A", refsource: "CONFIRM", tags: [ "Third Party Advisory", ], url: "https://www.thezdi.com/blog/2020/3/19/pwn2own-2020-day-one-results", }, { name: "N/A", refsource: "CONFIRM", tags: [ "Patch", "Vendor Advisory", ], url: "https://lore.kernel.org/bpf/20200330160324.15259-1-daniel@iogearbox.net/T/", }, { name: "N/A", refsource: "UBUNTU", tags: [ "Third Party Advisory", ], url: "https://usn.ubuntu.com/usn/usn-4313-1", }, { name: "N/A", refsource: "CONFIRM", tags: [ "Patch", "Vendor Advisory", ], url: "https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef", }, { name: "USN-4313-1", refsource: "UBUNTU", tags: [ "Third Party Advisory", ], url: "https://usn.ubuntu.com/4313-1/", }, { name: "FEDORA-2020-4ef0bcc89c", refsource: "FEDORA", tags: [ "Mailing List", "Third Party Advisory", ], url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F7OONYGMSYBEFHLHZJK3GOI5Z553G4LD/", }, { name: "FEDORA-2020-666f3b1ac3", refsource: "FEDORA", tags: [ "Mailing List", "Third Party Advisory", ], url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YXBWSHZ6DJIZVXKXGZPK6QPFCY7VKZEG/", }, { name: "FEDORA-2020-73c00eda1c", refsource: "FEDORA", tags: [ "Mailing List", "Third Party Advisory", ], url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TF4PQZBEPNXDSK5DOBMW54OCLP25FTCD/", }, { name: "https://security.netapp.com/advisory/ntap-20200430-0004/", refsource: "CONFIRM", tags: [ "Third Party Advisory", ], url: "https://security.netapp.com/advisory/ntap-20200430-0004/", }, { name: "[oss-security] 20210720 CVE-2021-33909: size_t-to-int vulnerability in Linux's filesystem layer", refsource: "MLIST", tags: [ "Exploit", "Mailing List", "Third Party Advisory", ], url: "http://www.openwall.com/lists/oss-security/2021/07/20/1", }, ], }, }, impact: { baseMetricV2: { acInsufInfo: false, cvssV2: { accessComplexity: "LOW", accessVector: "LOCAL", authentication: "NONE", availabilityImpact: "COMPLETE", baseScore: 7.2, confidentialityImpact: "COMPLETE", integrityImpact: "COMPLETE", vectorString: "AV:L/AC:L/Au:N/C:C/I:C/A:C", version: "2.0", }, exploitabilityScore: 3.9, impactScore: 10, obtainAllPrivilege: false, obtainOtherPrivilege: false, obtainUserPrivilege: false, severity: "HIGH", userInteractionRequired: false, }, baseMetricV3: { cvssV3: { attackComplexity: "LOW", attackVector: "LOCAL", availabilityImpact: "HIGH", baseScore: 7.8, baseSeverity: "HIGH", confidentialityImpact: "HIGH", integrityImpact: "HIGH", privilegesRequired: "LOW", scope: "UNCHANGED", userInteraction: "NONE", vectorString: "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", version: "3.1", }, exploitabilityScore: 1.8, impactScore: 5.9, }, }, lastModifiedDate: "2023-02-24T18:42Z", publishedDate: "2020-04-02T18:15Z", }, }, }
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Sightings
| Author | Source | Type | Date |
|---|
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.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- 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.