#VU24327 Off-by-one in Wireshark - CVE-2020-7044

Vulnerability identifier: #VU24327

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-7044

CWE-ID: CWE-193

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Wireshark
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Wireshark.org

Description

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

The vulnerability exists due to an off-by-one error within the WASSP dissector. A remote attacker can send specially crafted network traffic, trigger an off-by-one error and crash the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Wireshark: 3.2.0

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External links
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=16324
https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=f90a3720b73ca140403315126e2a478c4f70ca03
https://www.wireshark.org/security/wnpa-sec-2020-01.html

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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