NULL pointer dereference in Debian Linux

1) NULL pointer dereference

EUVDB-ID: #VU33468

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-2019-9208

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error in Wireshark 2.4.0 to 2.4.12 and 2.6.0 to 2.6.6, the TCAP dissector could crash. This was addressed in epan/dissectors/asn1/tcap/tcap.cnf by avoiding NULL pointer dereferences. A remote attacker can perform a denial of service (DoS) attack.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Debian Linux: 9.0

CPE2.3

• cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

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=15464
https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=3d1b8004ed3a07422ca5d4e4ee8097150b934fd2
https://seclists.org/bugtraq/2019/Mar/35
https://usn.ubuntu.com/3986-1/
https://www.debian.org/security/2019/dsa-4416
https://www.oracle.com/security-alerts/cpujan2020.html
https://www.wireshark.org/security/wnpa-sec-2019-07.html

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.