Input validation error in Wireshark - CVE-2021-4186

Vulnerability identifier: #VU59124

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-4186

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in Gryphon dissector. A remote attacker can pass specially crafted traffic through the network and perform a denial of service (DoS) attack.

Wireshark
Amazon Linux AMI
Gentoo Linux
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Linux Enterprise Storage
Ubuntu
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Desktop
SUSE Linux Enterprise Server for SAP Applications
SUSE Linux Enterprise Module for Basesystem
SUSE Linux Enterprise Module for Desktop Applications
SUSE Linux Enterprise Server
openSUSE Leap
Fedora
wireshark (Ubuntu package)
wireshark
net-analyzer/wireshark
wireshark-debugsource
wireshark-devel
wireshark-ui-qt
wireshark-ui-qt-debuginfo
libwireshark15
wireshark-debuginfo
libwsutil13-debuginfo
libwsutil13
libwiretap12-debuginfo
libwiretap12
libwireshark15-debuginfo
vim

Install updates from vendor's website.

Wireshark - addressed in versions 3.4.11, 3.6.1
wireshark (Ubuntu package) - addressed in versions 2.6.10-1~ubuntu14.04.0~esm3, 2.6.10-1~ubuntu16.04.0+esm2, 2.6.10-1~ubuntu18.04.0+esm2, 3.2.3-1ubuntu0.1~esm2, 3.6.2-2ubuntu0.1~esm1
wireshark - addressed in versions 3.6.1-1.fc34, 3.6.1-1.fc35
net-analyzer/wireshark - update to 3.6.8
wireshark-debugsource - update to 3.6.8-150000.3.74.1
wireshark-devel - update to 3.6.8-150000.3.74.1
wireshark-ui-qt - update to 3.6.8-150000.3.74.1
wireshark-ui-qt-debuginfo - update to 3.6.8-150000.3.74.1
libwireshark15 - update to 3.6.8-150000.3.74.1
wireshark-debuginfo - update to 3.6.8-150000.3.74.1
wireshark - update to 3.6.8-150000.3.74.1
libwsutil13-debuginfo - update to 3.6.8-150000.3.74.1
libwsutil13 - update to 3.6.8-150000.3.74.1
libwiretap12-debuginfo - update to 3.6.8-150000.3.74.1
libwiretap12 - update to 3.6.8-150000.3.74.1
libwireshark15-debuginfo - update to 3.6.8-150000.3.74.1
wireshark - update to 4.0.2-1
vim - addressed in versions 8.2.4006-1.fc34, 8.2.4006-1.fc35, 8.2.4068-1.fc34

• https://www.wireshark.org/security/wnpa-sec-2021-16.html

• Multiple vulnerabilities in Wireshark
• SUSE update for wireshark
• Gentoo update for Wireshark
• Amazon Linux AMI update for wireshark
• Fedora 35 update for vim
• Fedora 34 update for vim
• Fedora 34 update for wireshark
• Fedora 35 update for wireshark
• Fedora 34 update for vim
• Ubuntu update for wireshark