gsd-2020-12826
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
A signal access-control issue was discovered in the Linux kernel before 5.6.5, aka CID-7395ea4e65c2. Because exec_id in include/linux/sched.h is only 32 bits, an integer overflow can interfere with a do_notify_parent protection mechanism. A child process can send an arbitrary signal to a parent process in a different security domain. Exploitation limitations include the amount of elapsed time before an integer overflow occurs, and the lack of scenarios where signals to a parent process present a substantial operational threat.
Aliases
Aliases
{ "GSD": { "alias": "CVE-2020-12826", "description": "A signal access-control issue was discovered in the Linux kernel before 5.6.5, aka CID-7395ea4e65c2. Because exec_id in include/linux/sched.h is only 32 bits, an integer overflow can interfere with a do_notify_parent protection mechanism. A child process can send an arbitrary signal to a parent process in a different security domain. Exploitation limitations include the amount of elapsed time before an integer overflow occurs, and the lack of scenarios where signals to a parent process present a substantial operational threat.", "id": "GSD-2020-12826", "references": [ "https://www.suse.com/security/cve/CVE-2020-12826.html", "https://access.redhat.com/errata/RHSA-2020:4609", "https://access.redhat.com/errata/RHSA-2020:4431", "https://access.redhat.com/errata/RHSA-2020:4062", "https://access.redhat.com/errata/RHSA-2020:4060", "https://ubuntu.com/security/CVE-2020-12826", "https://alas.aws.amazon.com/cve/html/CVE-2020-12826.html", "https://linux.oracle.com/cve/CVE-2020-12826.html" ] }, "gsd": { "metadata": { "exploitCode": "unknown", "remediation": "unknown", "reportConfidence": "confirmed", "type": "vulnerability" }, "osvSchema": { "aliases": [ "CVE-2020-12826" ], "details": "A signal access-control issue was discovered in the Linux kernel before 5.6.5, aka CID-7395ea4e65c2. Because exec_id in include/linux/sched.h is only 32 bits, an integer overflow can interfere with a do_notify_parent protection mechanism. A child process can send an arbitrary signal to a parent process in a different security domain. Exploitation limitations include the amount of elapsed time before an integer overflow occurs, and the lack of scenarios where signals to a parent process present a substantial operational threat.", "id": "GSD-2020-12826", "modified": "2023-12-13T01:21:49.011541Z", "schema_version": "1.4.0" } }, "namespaces": { "cve.org": { "CVE_data_meta": { "ASSIGNER": "cve@mitre.org", "ID": "CVE-2020-12826", "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": "A signal access-control issue was discovered in the Linux kernel before 5.6.5, aka CID-7395ea4e65c2. Because exec_id in include/linux/sched.h is only 32 bits, an integer overflow can interfere with a do_notify_parent protection mechanism. A child process can send an arbitrary signal to a parent process in a different security domain. Exploitation limitations include the amount of elapsed time before an integer overflow occurs, and the lack of scenarios where signals to a parent process present a substantial operational threat." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "references": { "reference_data": [ { "name": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5", "refsource": "MISC", "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5" }, { "name": "https://www.openwall.com/lists/kernel-hardening/2020/03/25/1", "refsource": "MISC", "url": "https://www.openwall.com/lists/kernel-hardening/2020/03/25/1" }, { "name": "https://lists.openwall.net/linux-kernel/2020/03/24/1803", "refsource": "MISC", "url": "https://lists.openwall.net/linux-kernel/2020/03/24/1803" }, { "name": "https://github.com/torvalds/linux/commit/7395ea4e65c2a00d23185a3f63ad315756ba9cef", "refsource": "MISC", "url": "https://github.com/torvalds/linux/commit/7395ea4e65c2a00d23185a3f63ad315756ba9cef" }, { "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1822077", "refsource": "CONFIRM", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1822077" }, { "name": "USN-4367-1", "refsource": "UBUNTU", "url": "https://usn.ubuntu.com/4367-1/" }, { "name": "USN-4369-1", "refsource": "UBUNTU", "url": "https://usn.ubuntu.com/4369-1/" }, { "name": "https://security.netapp.com/advisory/ntap-20200608-0001/", "refsource": "CONFIRM", "url": "https://security.netapp.com/advisory/ntap-20200608-0001/" }, { "name": "[debian-lts-announce] 20200609 [SECURITY] [DLA 2241-1] linux security update", "refsource": "MLIST", "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html" }, { "name": "[debian-lts-announce] 20200610 [SECURITY] [DLA 2241-2] linux security update", "refsource": "MLIST", "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html" }, { "name": "USN-4391-1", "refsource": "UBUNTU", "url": "https://usn.ubuntu.com/4391-1/" } ] } }, "nvd.nist.gov": { "configurations": { "CVE_data_version": "4.0", "nodes": [ { "children": [], "cpe_match": [ { "cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndExcluding": "5.6.5", "vulnerable": true } ], "operator": "OR" }, { "children": [], "cpe_match": [ { "cpe23Uri": "cpe:2.3:o:redhat:enterprise_mrg:2.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true }, { "cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true }, { "cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true }, { "cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true }, { "cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true }, { "cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true } ], "operator": "OR" } ] }, "cve": { "CVE_data_meta": { "ASSIGNER": "cve@mitre.org", "ID": "CVE-2020-12826" }, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "en", "value": "A signal access-control issue was discovered in the Linux kernel before 5.6.5, aka CID-7395ea4e65c2. Because exec_id in include/linux/sched.h is only 32 bits, an integer overflow can interfere with a do_notify_parent protection mechanism. A child process can send an arbitrary signal to a parent process in a different security domain. Exploitation limitations include the amount of elapsed time before an integer overflow occurs, and the lack of scenarios where signals to a parent process present a substantial operational threat." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "en", "value": "CWE-190" } ] } ] }, "references": { "reference_data": [ { "name": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5", "refsource": "MISC", "tags": [ "Release Notes", "Third Party Advisory" ], "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5" }, { "name": "https://github.com/torvalds/linux/commit/7395ea4e65c2a00d23185a3f63ad315756ba9cef", "refsource": "MISC", "tags": [ "Patch", "Third Party Advisory" ], "url": "https://github.com/torvalds/linux/commit/7395ea4e65c2a00d23185a3f63ad315756ba9cef" }, { "name": "https://www.openwall.com/lists/kernel-hardening/2020/03/25/1", "refsource": "MISC", "tags": [ "Exploit", "Mailing List", "Patch", "Third Party Advisory" ], "url": "https://www.openwall.com/lists/kernel-hardening/2020/03/25/1" }, { "name": "https://lists.openwall.net/linux-kernel/2020/03/24/1803", "refsource": "MISC", "tags": [ "Exploit", "Mailing List", "Patch", "Third Party Advisory" ], "url": "https://lists.openwall.net/linux-kernel/2020/03/24/1803" }, { "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1822077", "refsource": "CONFIRM", "tags": [ "Issue Tracking", "Patch", "Third Party Advisory" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1822077" }, { "name": "USN-4367-1", "refsource": "UBUNTU", "tags": [ "Third Party Advisory" ], "url": "https://usn.ubuntu.com/4367-1/" }, { "name": "USN-4369-1", "refsource": "UBUNTU", "tags": [], "url": "https://usn.ubuntu.com/4369-1/" }, { "name": "https://security.netapp.com/advisory/ntap-20200608-0001/", "refsource": "CONFIRM", "tags": [], "url": "https://security.netapp.com/advisory/ntap-20200608-0001/" }, { "name": "[debian-lts-announce] 20200609 [SECURITY] [DLA 2241-1] linux security update", "refsource": "MLIST", "tags": [], "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html" }, { "name": "[debian-lts-announce] 20200610 [SECURITY] [DLA 2241-2] linux security update", "refsource": "MLIST", "tags": [], "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html" }, { "name": "USN-4391-1", "refsource": "UBUNTU", "tags": [], "url": "https://usn.ubuntu.com/4391-1/" } ] } }, "impact": { "baseMetricV2": { "acInsufInfo": false, "cvssV2": { "accessComplexity": "MEDIUM", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.4, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0" }, "exploitabilityScore": 3.4, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "severity": "MEDIUM", "userInteractionRequired": false }, "baseMetricV3": { "cvssV3": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L", "version": "3.1" }, "exploitabilityScore": 1.8, "impactScore": 3.4 } }, "lastModifiedDate": "2021-07-15T19:16Z", "publishedDate": "2020-05-12T19:15Z" } } }
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- 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.