SB2025032402 - Ubuntu update for nltk

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Inefficient regular expression complexity (CVE-ID: CVE-2021-3842)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient input validation when processing untrusted input with a regular expressions. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.

2) Inefficient regular expression complexity (CVE-ID: CVE-2021-43854)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient input validation when processing untrusted input with a regular expressions. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.

Remediation

Install update from vendor's website.

References

• https://ubuntu.com/security/notices/USN-7365-1