CVE-2020-27783 (Medium) detected in lxml-4.5.0-cp27-cp27mu-manylinux1_x86_64.whl, lxml-3.3.5.tar.gz

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CVE-2020-27783 - Medium Severity Vulnerability

Vulnerable Libraries - lxml-4.5.0-cp27-cp27mu-manylinux1_x86_64.whl, lxml-3.3.5.tar.gz

lxml-4.5.0-cp27-cp27mu-manylinux1_x86_64.whl

Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API.

Library home page: https://files.pythonhosted.org/packages/03/06/eb9f000882f671a2d494342c1fe93b1c8b18fb04420bb611aeaa3298ef17/lxml-4.5.0-cp27-cp27mu-manylinux1_x86_64.whl

Path to dependency file: clusterfuzz/src/python/bot/tasks

Path to vulnerable library: clusterfuzz/src/python/bot/tasks,clusterfuzz/src/local/butler/scripts,clusterfuzz/src/requirements.txt,clusterfuzz/src/appengine/handlers/cron/project,clusterfuzz/src/python/bot/untrusted_runner/build,clusterfuzz/src/appengine/requirements.txt,clusterfuzz/resources/platform/linux/peach/peach_mutator/peach_mutator/requirements.txt,clusterfuzz/src/platform_requirements.txt

Dependency Hierarchy:

• ❌ lxml-4.5.0-cp27-cp27mu-manylinux1_x86_64.whl (Vulnerable Library)

lxml-3.3.5.tar.gz

Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API.

Library home page: https://files.pythonhosted.org/packages/ae/a8/ad6c2350c65b357faf9a06c7428b5c6159b01bd3014eed93a75513843063/lxml-3.3.5.tar.gz

Path to dependency file: clusterfuzz/src/python/bot/untrusted_runner/build

Path to vulnerable library: clusterfuzz/src/python/bot/untrusted_runner/build,clusterfuzz/resources/platform/linux/peach/peach_mutator/peach_mutator/third_party/peach/requirements.txt,clusterfuzz/src/local/butler/scripts,clusterfuzz/src/python/bot/tasks,clusterfuzz/src/appengine/handlers/cron/project

Dependency Hierarchy:

• ❌ lxml-3.3.5.tar.gz (Vulnerable Library)

Vulnerability Details

A XSS vulnerability was discovered in python-lxml's clean module. The module's parser didn't properly imitate browsers, which caused different behaviors between the sanitizer and the user's page. A remote attacker could exploit this flaw to run arbitrary HTML/JS code.

Publish Date: 2020-12-03

URL: CVE-2020-27783

CVSS 3 Score Details (6.1)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Changed
• Impact Metrics:
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://bugzilla.redhat.com/show_bug.cgi?id=1901633

Release Date: 2020-10-27

Fix Resolution: 4.6.1