Use-after-free in Vim - CVE-2021-3796

Vulnerability identifier: #VU63065

CSH Severity: High

CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-3796

CWE-ID: CWE-416

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a use-after-free error. A remote attacker can trick the victim to open a specially crafted file, trigger a use-after-free error and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Vim
Dell Data Protection Central
Dell EMC PowerProtect Data Protection
EMC Cloud Tiering Appliance
Gentoo Linux
SUSE CaaS Platform
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Linux Enterprise Micro
SUSE Enterprise Storage
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for x86_64
Anolis OS
SUSE OpenStack Cloud Crowbar
SUSE OpenStack Cloud
SUSE Linux Enterprise Server
SUSE Linux Enterprise Server for SAP
Ubuntu
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Realtime Extension
SUSE Linux Enterprise Desktop
SUSE Linux Enterprise Server for SAP Applications
SUSE Linux Enterprise Module for Desktop Applications
SUSE Linux Enterprise Module for Basesystem
openSUSE Leap
openEuler
Fedora
Red Hat Advanced Cluster Management for Kubernetes
Dell Secure Connect Gateway
Dell EMC Storage Monitoring and Reporting (SMR)
EMC ViPR SRM
Dell EMC Unity VSA Operating Environment (OE)
Dell EMC Unity XT Operating Environment (OE)
Dell EMC Unity Operating Environment (OE)
Dell EMC VxRail Appliance
vim (Ubuntu package)
vim-small
vim-debugsource
vim-debuginfo
vim-small-debuginfo
vim-data-common
vim-data
vim
gvim-debuginfo
gvim
vim (Red Hat package)
vim-X11
vim-common
vim-enhanced
vim-minimal
vim-filesystem
app-editors/gvim
app-editors/vim
app-editors/vim-core

Install updates from vendor's website.

Vim - update to 8.2.3428
Red Hat Advanced Cluster Management for Kubernetes - update to 2.2.10
Dell EMC Storage Monitoring and Reporting (SMR) - update to 4.9.0.0
EMC ViPR SRM - update to 4.9.0.0
Dell EMC Unity VSA Operating Environment (OE) - update to 5.2.0.0.5.173
Dell EMC Unity XT Operating Environment (OE) - update to 5.2.0.0.5.173
Dell EMC Unity Operating Environment (OE) - update to 5.2.0.0.5.173
Dell Secure Connect Gateway - update to 5.14.00.16
Dell EMC VxRail Appliance - addressed in versions 7.0.372, 8.0.000
vim (Ubuntu package) - addressed in versions 2:8.0.1453-1ubuntu1.6, 2:8.1.2269-1ubuntu5.3, 2:8.2.2434-1ubuntu1.1
vim-small - addressed in versions 8.0.1568-5.17.1, 8.2.5038-150000.5.21.1
vim-debugsource - addressed in versions 8.0.1568-5.17.1, 8.2.5038-150000.5.21.1, 9.0.0814-17.9.1
vim-debuginfo - addressed in versions 8.0.1568-5.17.1, 8.2.5038-150000.5.21.1, 9.0.0814-17.9.1
vim-small-debuginfo - addressed in versions 8.0.1568-5.17.1, 8.2.5038-150000.5.21.1
vim-data-common - addressed in versions 8.0.1568-5.17.1, 8.2.5038-150000.5.21.1, 9.0.0814-17.9.1
vim-data - addressed in versions 8.0.1568-5.17.1, 8.2.5038-150000.5.21.1, 9.0.0814-17.9.1
vim - addressed in versions 8.0.1568-5.17.1, 8.2.5038-150000.5.21.1, 9.0.0814-17.9.1
gvim-debuginfo - addressed in versions 8.0.1568-5.17.1, 8.2.5038-150000.5.21.1, 9.0.0814-17.9.1
gvim - addressed in versions 8.0.1568-5.17.1, 8.2.5038-150000.5.21.1, 9.0.0814-17.9.1
vim (Red Hat package) - update to 8.0.1763-16.el8
vim-X11 - addressed in versions 8.0.1763-16.0.1, 8.0.1763-19.0.1
vim-common - addressed in versions 8.0.1763-16.0.1, 8.0.1763-19.0.1
vim-enhanced - addressed in versions 8.0.1763-16.0.1, 8.0.1763-19.0.1
vim-minimal - addressed in versions 8.0.1763-16.0.1, 8.0.1763-19.0.1
vim-filesystem - addressed in versions 8.0.1763-16.0.1, 8.0.1763-19.0.1
vim-filesystem - update to 8.2-3
vim-minimal - update to 8.2-3
vim-common - update to 8.2-3
vim-X11 - update to 8.2-3
vim-debuginfo - update to 8.2-3
vim-debugsource - update to 8.2-3
vim - update to 8.2-3
vim-enhanced - update to 8.2-3
vim - addressed in versions 8.2.3512-1.fc33, 8.2.3512-1.fc34, 8.2.3512-1.fc35
app-editors/gvim - update to 9.0.0060
app-editors/vim - update to 9.0.0060
app-editors/vim-core - update to 9.0.0060
EMC Cloud Tiering Appliance - update to 13.1.0.2.29

• https://github.com/vim/vim/commit/35a9a00afcb20897d462a766793ff45534810dc3
• https://huntr.dev/bounties/ab60b7f3-6fb1-4ac2-a4fa-4d592e08008d
• http://www.openwall.com/lists/oss-security/2021/10/01/1
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TE62UMYBZE4AE53K6OBBWK32XQ7544QM/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S42L4Z4DTW4LHLQ4FJ33VEOXRCBE7WN4/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7K4JJBIH3OQSZRVTWKCJCDLGMFGQ5DOH/
• https://lists.debian.org/debian-lts-announce/2022/01/msg00003.html

• Multiple vulnerabilities in Vim
• Ubuntu update for vim
• SUSE update for vim
• Gentoo update for Vim, gVim
• Multiple vulnerabilities in Dell VxRail
• SUSE update for vim
• Multiple vulnerabilities in Dell VxRail Appliance components
• Red Hat Enterprise Linux 8 update for vim
• Multiple vulnerabilities in Dell Secure Connect Gateway
• Multiple vulnerabilities in Dell Cloud Tiering Appliance
• SUSE update for vim
• SUSE update for vim
• Multiple vulnerabilities in Dell EMC SRM and Dell EMC Storage Monitoring and Reporting (SMR)
• Multiple vulnerabilities in Dell Unity, Dell UnityVSA, and Dell Unity XT
• Multiple vulnerabilities in Dell Data Protection Central
• openEuler update for vim
• Fedora 35 update for vim
• Fedora 34 update for vim
• Fedora 33 update for vim
• Anolis OS update for vim
• Anolis OS update for vim
• Anolis OS update for vim
• Anolis OS update for vim
• Multiple vulnerabilities in Red Hat Advanced Cluster Management for Kubernetes 2.2