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Ubuntu 7365-1: NLTK Security Advisory Updates

Several security issues were fixed in NLTK.. ========================================================================== Ubuntu Security Notice USN-7365-1 March 24, 2025 nltk vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS Summary: Several security issues were fixed in NLTK. Software Description: - nltk: Natural Language Toolkit Details: It was discovered that NLTK contained a regex that is susceptible to catastrophic backtracking. An attacker could possibly use this issue to cause a denial of service. (CVE-2021-3842, CVE-2021-43854) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS python3-nltk 3.4.5-2ubuntu0.1~esm2 Available with Ubuntu Pro Ubuntu 18.04 LTS python-nltk 3.2.5-1ubuntu0.1+esm2 Available with Ubuntu Pro python3-nltk 3.2.5-1ubuntu0.1+esm2 Available with Ubuntu Pro Ubuntu 16.04 LTS python-nltk 3.1-1ubuntu0.1+esm2 Available with Ubuntu Pro python3-nltk 3.1-1ubuntu0.1+esm2 Available with Ubuntu Pro Ubuntu 14.04 LTS python-nltk 2.0~b9-0ubuntu4.1~esm4 Available with Ubuntu Pro In general, a standard system update will makeall the necessary changes. References: https://ubuntu.com/security/notices/USN-7365-1 CVE-2021-3842, CVE-2021-43854 . Multiple security fixes were issued for NLTK in Ubuntu LTS releases. Review details and updates required.. security, ========================================================. . Severity: Critical. LinuxSecurity.com Team

Mar 24, 2025 •Critical Ubuntu