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Test ID:1.3.6.1.4.1.25623.1.1.12.2025.7365.1
Category:Ubuntu Local Security Checks
Title:Ubuntu: Security Advisory (USN-7365-1)
Summary:The remote host is missing an update for the 'nltk' package(s) announced via the USN-7365-1 advisory.
Description:Summary:
The remote host is missing an update for the 'nltk' package(s) announced via the USN-7365-1 advisory.

Vulnerability Insight:
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)

Affected Software/OS:
'nltk' package(s) on Ubuntu 14.04, Ubuntu 16.04, Ubuntu 18.04, Ubuntu 20.04.

Solution:
Please install the updated package(s).

CVSS Score:
5.0

CVSS Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2021-3842
https://huntr.dev/bounties/761a761e-2be2-430a-8d92-6f74ffe9866a
https://github.com/nltk/nltk/commit/2a50a3edc9d35f57ae42a921c621edc160877f4d
Common Vulnerability Exposure (CVE) ID: CVE-2021-43854
https://github.com/nltk/nltk/security/advisories/GHSA-f8m6-h2c7-8h9x
https://github.com/nltk/nltk/commit/1405aad979c6b8080dbbc8e0858f89b2e3690341
https://github.com/nltk/nltk/issues/2866
https://github.com/nltk/nltk/pull/2869
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