Out-of-bounds read in Wireshark



Published: 2020-12-16 | Updated: 2020-12-19
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-26421
CWE-ID CWE-125
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Wireshark
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor Wireshark.org

Security Bulletin

This security bulletin contains information about 1 vulnerabilities.

Updated: 19.12.2020

Changed bulletin patch status to patched, added fixed versions.

1) Out-of-bounds read

EUVDB-ID: #VU49036

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26421

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

Crash in USB HID protocol dissector and possibly other dissectors in Wireshark 3.4.0 and 3.2.0 to 3.2.8 allows denial of service via packet injection or crafted capture file.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Wireshark: 3.2.0 - 3.4.0

External links

http://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26421.json
http://gitlab.com/wireshark/wireshark/-/issues/16958
http://www.wireshark.org/security/wnpa-sec-2020-17.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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