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A flaw was found in the QEMU virtio-fs shared file system daemon (virtiofsd) implementation. This flaw is strictly related to CVE-2018-13405. A local guest user can create files in the directories shared by virtio-fs with unintended group ownership in a scenario where a directory is SGID to a certain group and is writable by a user who is not a member of the group. This could allow a malicious unprivileged user inside the guest to gain access to resources accessible to the root group potentially escalating their privileges within the guest. A malicious local user in the host might also leverage this unexpected executable file created by the guest to escalate their privileges on the host system.

🗓️ 05 Aug 2024 07:00:00Reported by MicrosoftType 
mscve
 mscve🔗 msrc.microsoft.com👁 1 Views

A flaw in virtiofsd lets a guest create files with group ownership in setgid directories, risking privilege escalation inside the guest and on the host.

Related
Detection
ReporterTitlePublishedViews
Family
0day.today		Linux Ubuntu - Other Users coredumps can be read via setgid Directory and killpriv Bypass Exploit
16 Jul 201800:00
–zdt
IBM Security Bulletins		Security Bulletin: IBM API Connect has addressed multiple vulnerabilities in Developer Portal's dependencies - Cumulative list from June 28, 2018 to December 13, 2018
28 Jan 201917:05
–ibm
IBM Security Bulletins		Security Bulletin: Vyatta 5600 vRouter Software Patches - Release 1801q
10 Oct 201821:05
–ibm
IBM Security Bulletins		Security Bulletin: IBM QRadar Network Security is affected by Linux kernel vulnerabilities
27 Jun 201908:40
–ibm
IBM Security Bulletins		Security Bulletin: Vulnerabilities in the Linux Kernel affect PowerKVM
17 May 201916:05
–ibm
IBM Security Bulletins		Security Bulletin: IBM API Connect is affected by multiple third-party vulnerabilities (Node.js, nghttp2, Linux, Intel CPU, Android)
31 Oct 201820:10
–ibm
ALT Linux		Security fix for the ALT Linux 10 package qemu version 6.1.1-alt1
1 Mar 202200:00
–altlinux
Tenable Nessus		Amazon Linux 2022 : qemu, qemu-audio-alsa, qemu-audio-oss (ALAS2022-2022-050)
6 Sep 202200:00
–nessus
Tenable Nessus		Alibaba Cloud Linux 3 : 0022: virt:rhel and virt-devel:rhel (ALINUX3-SA-2022:0022)
14 May 202500:00
–nessus
Tenable Nessus		Alibaba Cloud Linux 3 : 0119: virt:rhel and virt-devel:rhel (ALINUX3-SA-2022:0119)
14 May 202500:00
–nessus
Rows per page
Vulners
Node
microsoftazl3_qemu_6.2.0-18Range<6.2.0-18
OR
microsoftcbl2_qemu_6.2.0-5Range<6.2.0-5
OR
microsoftcm1_qemu-kvm_4.2.0-48Range<4.2.0-48

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11 Sep 2024 07:00Current
8.4High risk
Vulners AI Score8.4
CVSS 24.6
CVSS 3.17.8
EPSS0.00152
virtiofsd flawsetgid directoriesprivilege escalationguest privilege escalationhost privilege escalationshared directories
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