p PatchFirst

CVE-2021-43854

CVE-2021-43854 · Inefficient Regular Expression Complexity in nltk

Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.

NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing. Versions prior to 3.6.5 are vulnerable to regular expression denial of service (ReDoS) attacks. The vulnerability is present in PunktSentenceTokenizer, sent_tokenize and word_tokenize. Any users of this class, or these two functions, are vulnerable to the ReDoS attack. In short, a specifically crafted long input to any of these vulnerable functions will cause them to take a significant amount of execution time. If your program relies on any of the vulnerable functions for tokenizing unpredictable user input, then we would strongly recommend upgrading to a version of NLTK without the vulnerability. For users unable to upgrade the execution time can be bounded by limiting the maximum length of an input to any of the vulnerable functions. Our recommendation is to implement such a limit.

CVSS 7.5 · Alta · EPSS 2,8% · Corrección disponible

Publicación
Actualización

Pila tecnológica: system · python

Productos y versiones afectados

  • nltk

    Versiones
    • < 3.6.5: Afectada

    Sin corrección publicada

  • nltk Debian:12

    Intervalos de versiones afectados
    • ECOSYSTEM: < 3.6.7-1

    Actualiza a 3.6.7-1

  • nltk Debian:13

    Intervalos de versiones afectados
    • ECOSYSTEM: < 3.6.7-1

    Actualiza a 3.6.7-1

  • nltk Debian:14

    Intervalos de versiones afectados
    • ECOSYSTEM: < 3.6.7-1

    Actualiza a 3.6.7-1

  • nltk PyPI

    Versiones
    • 0.8
    • 0.9
    • 0.9.3
    • 0.9.4
    • 0.9.5
    • 0.9.6
    • 0.9.7
    • 0.9.8
    • 0.9.9
    • 2.0.1
    • 2.0.1rc1
    • 2.0.1rc2-git
    • 2.0.1rc3
    • 2.0.1rc4
    • 2.0.2
    • 2.0.3
    • 2.0.4
    • 2.0.5
    • 2.0b4
    • 2.0b5
    • 2.0b6
    • 2.0b7
    • 2.0b8
    • 2.0b9
    • 3.0.0
    • 3.0.0b1
    • 3.0.0b2
    • 3.0.1
    • 3.0.2
    • 3.0.3
    • 3.0.4
    • 3.0.5
    • 3.1
    • 3.2
    • 3.2.1
    • 3.2.2
    • 3.2.3
    • 3.2.4
    • 3.2.5
    • 3.3
    • 3.4
    • 3.4.1
    • 3.4.2
    • 3.4.3
    • 3.4.4
    • 3.4.5
    • 3.5
    • 3.5b1
    • 3.6
    • 3.6.1
    • 3.6.2
    • 3.6.3
    • 3.6.4
    • 3.6.5
    Intervalos de versiones afectados
    • ECOSYSTEM: < 3.6.6

    Actualiza a 3.6.6

  • nltk PyPI

    Versiones
    • 0.8
    • 0.9
    • 0.9.3
    • 0.9.4
    • 0.9.5
    • 0.9.6
    • 0.9.7
    • 0.9.8
    • 0.9.9
    • 2.0.1
    • 2.0.1rc1
    • 2.0.1rc2-git
    • 2.0.1rc3
    • 2.0.1rc4
    • 2.0.2
    • 2.0.3
    • 2.0.4
    • 2.0.5
    • 2.0b4
    • 2.0b5
    • 2.0b6
    • 2.0b7
    • 2.0b8
    • 2.0b9
    • 3.0.0
    • 3.0.0b1
    • 3.0.0b2
    • 3.0.1
    • 3.0.2
    • 3.0.3
    • 3.0.4
    • 3.0.5
    • 3.1
    • 3.2
    • 3.2.1
    • 3.2.2
    • 3.2.3
    • 3.2.4
    • 3.2.5
    • 3.3
    • 3.4
    • 3.4.1
    • 3.4.2
    • 3.4.3
    • 3.4.4
    • 3.4.5
    • 3.5
    • 3.5b1
    • 3.6
    • 3.6.1
    • 3.6.2
    • 3.6.3
    • 3.6.4
    Intervalos de versiones afectados
    • GIT: < 1405aad979c6b8080dbbc8e0858f89b2e3690341
    • ECOSYSTEM: < 3.6.5

    Actualiza a 3.6.5

  • nltk Ubuntu:Pro:14.04:LTS

    Versiones
    • 2.0~b9-0ubuntu4
    • 2.0~b9-0ubuntu4.1~esm2
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.0~b9-0ubuntu4.1~esm4

    Actualiza a 2.0~b9-0ubuntu4.1~esm4

  • nltk Ubuntu:Pro:16.04:LTS

    Versiones
    • 3.0.4-1
    • 3.0.5-1
    • 3.1-1
    • 3.1-1ubuntu0.1
    • 3.1-1ubuntu0.1+esm1
    Intervalos de versiones afectados
    • ECOSYSTEM: < 3.1-1ubuntu0.1+esm2

    Actualiza a 3.1-1ubuntu0.1+esm2

  • nltk Ubuntu:Pro:18.04:LTS

    Versiones
    • 3.2.4-1
    • 3.2.5-1
    • 3.2.5-1ubuntu0.1
    • 3.2.5-1ubuntu0.1+esm1
    Intervalos de versiones afectados
    • ECOSYSTEM: < 3.2.5-1ubuntu0.1+esm2

    Actualiza a 3.2.5-1ubuntu0.1+esm2

  • nltk Ubuntu:Pro:20.04:LTS

    Versiones
    • 3.4.5-1
    • 3.4.5-2
    • 3.4.5-2ubuntu0.1~esm1
    Intervalos de versiones afectados
    • ECOSYSTEM: < 3.4.5-2ubuntu0.1~esm2

    Actualiza a 3.4.5-2ubuntu0.1~esm2

Fuentes originales

Comprueba tu servidor →