Is CVE-2016-7985 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2016-7985 being exploited in the wild.

How severe is CVE-2016-7985?

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

Is there a fix for CVE-2016-7985?

A patch was published on 2017-01-26: tcpdump 4.9.0 released fixing multiple vulnerabilities Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2016-7985 attacked?

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

Am I affected by CVE-2016-7985?

Check whether you run Tcpdump. 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-2016-7985: tcpdump buffer overflow in CALM FAST parser

CVE-2016-7985 · 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 CALM FAST 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 potentially allow the attacker to execute malicious code on the system running the tool, impacting network visibility and security operations.

Technologies: Tcpdump. Vendors: Tcpdump.

Quick answers

Is CVE-2016-7985 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2016-7985 being exploited in the wild.
How severe is CVE-2016-7985?: Critical severity, with a CVSS score of 9.8, published 28 January 2017.
Which products and versions are affected?: tcpdump tcpdump before 4.9.0.
Is there a fix for CVE-2016-7985?: A patch was published on 2017-01-26: tcpdump 4.9.0 released fixing multiple vulnerabilities Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2016-7985 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2016-7985?: Check whether you run Tcpdump. 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 the CALM FAST protocol parser within tcpdump versions prior to 4.9.0. The flaw is located in the calm_fast_print() function in print-calm-fast.c and is triggered by improper bounds checking when processing network packets. An unauthenticated remote attacker can exploit this by sending specially crafted packets to a network segment where tcpdump is performing live capture, or by providing a malicious pcap file for analysis. Successful exploitation can result in a denial of service (application crash) or arbitrary code execution with the privileges of the tcpdump process. The issue is resolved in version 4.9.0.

Affected products

tcpdump tcpdump before 4.9.0

Timeline

2017-01-26: patched: tcpdump 4.9.0 released fixing multiple vulnerabilities
2017-01-27: advisory: NVD published CVE-2016-7985

References

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