CVE-2017-5482: tcpdump buffer overflow in Q.933 parser

CVE-2017-5482 · 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 Q.933 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 an attacker to execute unauthorized code, potentially compromising the security of the monitoring system.

Technologies: Tcpdump. Vendors: Tcpdump.

Quick answers

Is CVE-2017-5482 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2017-5482 being exploited in the wild.
How severe is CVE-2017-5482?
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-2017-5482?
A patch was published on 2017-01-26: tcpdump 4.9.0 released fixing 41 vulnerabilities Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2017-5482 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2017-5482?
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 tcpdump versions prior to 4.9.0 within the Q.933 (Frame Relay) protocol parser. The flaw is located in the q933_print() function in print-fr.c and is distinct from CVE-2016-8575. An unauthenticated remote attacker can exploit this by sending specially crafted network packets or providing a malicious pcap file for analysis. 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 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 41 vulnerabilities
  • 2017-01-28: disclosed: NVD publication date

References

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