CVE-2017-17997 Null dereference in n/a

What is CVE-2017-17997?

CVE-2017-17997 is a high-severity vulnerability in Debian Debian Linux, published on 30 Dec 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In Wireshark before 2.2.12, the MRDISC dissector misuses a NULL pointer and crashes. This was addressed in epan/dissectors/packet-mrdisc.c by validating an IPv4 address. This vulnerability is similar to CVE-2017-9343.

Weakness: CWE-476

Which versions are affected by CVE-2017-17997?

It affects 2 products.

Products include Debian Debian Linux, Wireshark Wireshark.

How do I fix CVE-2017-17997?

Upgrade to a fixed version.

Is CVE-2017-17997 being exploited?

There is no known exploitation of CVE-2017-17997 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2017-17997, DEBIAN-CVE-2017-17997, GHSA-rc73-pc24-f3rr, UBUNTU-CVE-2017-17997.