#VU33486 NULL pointer dereference in Debian Linux - CVE-2019-9214

Vulnerability identifier: #VU33486

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-9214

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Debian Linux
Operating systems & Components / Operating system

Vendor: Debian

Description

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

In Wireshark 2.4.0 to 2.4.12 and 2.6.0 to 2.6.6, the RPCAP dissector could crash. This was addressed in epan/dissectors/packet-rpcap.c by avoiding an attempted dereference of a NULL conversation.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Debian Linux: 9.0

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External links
https://lists.opensuse.org/opensuse-security-announce/2019-04/msg00007.html
https://lists.opensuse.org/opensuse-security-announce/2019-05/msg00027.html
https://lists.opensuse.org/opensuse-security-announce/2020-03/msg00027.html
https://www.securityfocus.com/bid/107203
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=15536
https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=c557bb0910be271e49563756411a690a1bc53ce5
https://seclists.org/bugtraq/2019/Mar/35
https://usn.ubuntu.com/3986-1/
https://www.debian.org/security/2019/dsa-4416
https://www.wireshark.org/security/wnpa-sec-2019-08.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.