CVE-2022-2309 (High) detected in lxml-4.3.1-cp35-cp35m-manylinux1_x86_64.whl

[mend-bolt-for-github]

CVE-2022-2309 - High Severity Vulnerability

Vulnerable Library - lxml-4.3.1-cp35-cp35m-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/f4/1c/82d74b4527edca7218cc7d840c8b5e83cb32eacc194e7425fc2f346d4d76/lxml-4.3.1-cp35-cp35m-manylinux1_x86_64.whl

Dependency Hierarchy:

• ❌ lxml-4.3.1-cp35-cp35m-manylinux1_x86_64.whl (Vulnerable Library)

Found in HEAD commit: d18505a648a05289a7aac926f14f8b2cf6b2c4e9

Found in base branch: master

Vulnerability Details

NULL Pointer Dereference allows attackers to cause a denial of service (or application crash). This only applies when lxml is used together with libxml2 2.9.10 through 2.9.14. libxml2 2.9.9 and earlier are not affected. It allows triggering crashes through forged input data, given a vulnerable code sequence in the application. The vulnerability is caused by the iterwalk function (also used by the canonicalize function). Such code shouldn't be in wide-spread use, given that parsing + iterwalk would usually be replaced with the more efficient iterparse function. However, an XML converter that serialises to C14N would also be vulnerable, for example, and there are legitimate use cases for this code sequence. If untrusted input is received (also remotely) and processed via iterwalk function, a crash can be triggered.

Publish Date: 2022-07-05

URL: CVE-2022-2309

CVSS 3 Score Details (7.5)

Base Score Metrics:

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

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Release Date: 2022-07-05

Fix Resolution: 4.9.1

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