GHSA-2ww3-fxvq-293j

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    GHSA-2ww3-fxvq-293j

    Published: 29 Sept 2021Last Modified: 7 Oct 2024

    Summary: NLTK Vulnerable to REDoS

    Details: The nltk package is vulnerable to ReDoS (regular expression denial of service). An attacker that is able to provide as an input to the [`_read_comparison_block()`(https://github.com/nltk/nltk/blob/23f4b1c4b4006b0cb3ec278e801029557cec4e82/nltk/corpus/reader/comparative_sents.py#L259) function in the file `nltk/corpus/reader/comparative_sents.py` may cause an application to consume an excessive amount of CPU.

    References: https://nvd.nist.gov/vuln/detail/CVE-2021-3828, https://github.com/nltk/nltk/pull/2816, https://github.com/nltk/nltk/commit/277711ab1dec729e626b27aab6fa35ea5efbd7e6, https://github.com/advisories/GHSA-2ww3-fxvq-293j, https://github.com/nltk/nltk, https://github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2021-356.yaml, https://huntr.dev/bounties/d19aed43-75bc-4a03-91a0-4d0bb516bc32

    Affected packages

    Package

    Name: nltk

    Purl: pkg:pypi/nltk

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.6.4

    Affected versions

    0.8

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    GHSA-2ww3-fxvq-293j | CVE-DB