Test Kennung:	1.3.6.1.4.1.25623.1.1.10.2021.0410
Kategorie:	Mageia Linux Local Security Checks
Titel:	Mageia: Security Advisory (MGASA-2021-0410)
Zusammenfassung:	The remote host is missing an update for the 'kernel-linus' package(s) announced via the MGASA-2021-0410 advisory.
Beschreibung:	Summary: The remote host is missing an update for the 'kernel-linus' package(s) announced via the MGASA-2021-0410 advisory. Vulnerability Insight: This kernel-linus update is based on upstream 5.10.60 and fixes at least the following security issues: A missing validation of the 'int_ctl' VMCB field allows a malicious L1 guest to enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. The L2 guest is able to write to a limited but still relatively large subset of the host physical memory, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape (CVE-2021-3653). A missing validation of the 'virt_ext' VMCB field and allows a malicious L1 guest to disable both VMLOAD/VMSAVE intercepts and VLS (Virtual VMLOAD/VMSAVE) for the L2 guest. Under these circumstances, the L2 guest is able to run VMLOAD/VMSAVE unintercepted, and thus read/write portions of the host physical memory, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape (CVE-2021-3656). In kernel/bpf/hashtab.c in the Linux kernel through 5.13.8, there is an integer overflow and out-of-bounds write when many elements are placed in a single bucket (CVE-2021-38166). drivers/net/ethernet/xilinx/xilinx_emaclite.c in the Linux kernel before 5.13.3 makes it easier for attackers to defeat an ASLR protection mechanism because it prints a kernel pointer (CVE-2021-38205). For other upstream fixes, see the referenced changelogs. Affected Software/OS: 'kernel-linus' package(s) on Mageia 8. Solution: Please install the updated package(s). CVSS Score: 7.2 CVSS Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C
Querverweis:	Common Vulnerability Exposure (CVE) ID: CVE-2021-3653 http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html https://bugzilla.redhat.com/show_bug.cgi?id=1983686 https://www.openwall.com/lists/oss-security/2021/08/16/1 https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html Common Vulnerability Exposure (CVE) ID: CVE-2021-3656 https://bugzilla.redhat.com/show_bug.cgi?id=1983988 https://git.kernel.org/pub/scm/virt/kvm/kvm.git/commit/?id=c7dfa4009965a9b2d7b329ee970eb8da0d32f0bc https://github.com/torvalds/linux/commit/c7dfa4009965a9b2d7b329ee970eb8da0d32f0bc Common Vulnerability Exposure (CVE) ID: CVE-2021-38166 Debian Security Information: DSA-4978 (Google Search) https://www.debian.org/security/2021/dsa-4978 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GUVLBJKZMWA3E3YXSH4SZ7BOYGJP4GXP/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UL6CH5M5PRLMA3KPBX4LPUO6Z73GRISO/ https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=c4eb1f403243fc7bbb7de644db8587c03de36da6 https://lore.kernel.org/bpf/20210806150419.109658-1-th.yasumatsu@gmail.com/ Common Vulnerability Exposure (CVE) ID: CVE-2021-38205 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3 https://github.com/torvalds/linux/commit/d0d62baa7f505bd4c59cd169692ff07ec49dde37
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