FriBidi CVE-2019-18397 Stack Buffer Overflow Vulnerability



Date Discovered

November 7, 2019


FriBidi is prone to a stack-based buffer-overflow vulnerability. Successfully exploiting this issue may allow attackers to execute arbitrary code within the context of the affected application. Failed exploit attempts will result in a denial-of-service condition. FriBidi through versions 1.0.7 are vulnerable.

Technologies Affected

  • FriBidi FriBidi 1.0.0
  • FriBidi FriBidi 1.0.1
  • FriBidi FriBidi 1.0.2
  • FriBidi FriBidi 1.0.3
  • FriBidi FriBidi 1.0.4
  • FriBidi FriBidi 1.0.5
  • FriBidi FriBidi 1.0.7
  • Ubuntu Ubuntu Linux 19.04
  • Ubuntu Ubuntu Linux 19.10


Run all software as a nonprivileged user with minimal access rights.
To limit the potential damage that a successful exploit may achieve, run all nonadministrative software as a regular user with the least amount of privileges required to successfully operate.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.

Updates are available. Please see the references or vendor advisory for more information.


Alex Murray

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