Is CVE-2017-5202 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2017-5202 being exploited in the wild.

How severe is CVE-2017-5202?

Critical severity, with a CVSS score of 9.8, published 28 January 2017.

Is there a fix for CVE-2017-5202?

A patch was published on 2017-01-29: Debian released security update DSA-3775-1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2017-5202 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2017-5202?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2017-5202: tcpdump buffer overflow in ISO CLNS parser

CVE-2017-5202 · Severity: critical · CVSS 9.8 · Published 2017-01-28

tcpdump is a widely used command-line tool for monitoring and analyzing network traffic. A vulnerability in its ISO CLNS protocol parser allows an attacker to trigger a buffer overflow by sending specially crafted network packets. This could lead to a complete system crash or allow the attacker to gain unauthorized control over the system running the tool.

Quick answers

Is CVE-2017-5202 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2017-5202 being exploited in the wild.
How severe is CVE-2017-5202?: Critical severity, with a CVSS score of 9.8, published 28 January 2017.
Which products and versions are affected?: tcpdump tcpdump < 4.9.0.
Is there a fix for CVE-2017-5202?: A patch was published on 2017-01-29: Debian released security update DSA-3775-1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2017-5202 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2017-5202?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A buffer overflow vulnerability exists in tcpdump versions prior to 4.9.0 within the ISO CLNS (Connectionless Network Service) parser. The flaw is located in the clnp_print() function in print-isoclns.c and is triggered during the processing of malformed packets. A remote, unauthenticated attacker can exploit this by sending specially crafted network traffic to a segment where tcpdump is performing live capture, or by tricking a user into opening a malicious pcap file. Successful exploitation can result in a denial of service (application crash) or potentially arbitrary code execution with the privileges of the tcpdump process. The issue was addressed in version 4.9.0.

Affected products

tcpdump tcpdump < 4.9.0

Timeline

2017-01-26: disclosed: Vulnerability reported in Debian bug tracking system
2017-01-27: advisory: NVD publication date
2017-01-29: patched: Debian released security update DSA-3775-1

References

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