• Date Reported: November 23, 2020

• Advisory ID: WSA-2020-0008

• CVE identifiers: CVE-2020-13584, CVE-2020-9948, CVE-2020-9951, CVE-2020-9952, CVE-2020-9983.

Several vulnerabilities were discovered in WebKitGTK and WPE WebKit.

• CVE-2020-13584

  • Versions affected: WebKitGTK before 2.30.3 and WPE WebKit before 2.30.3.
  • Credit to Marcin ‘Icewall’ Noga of Cisco Talos.
  • Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Description: A use after free issue was addressed with improved memory management.

• CVE-2020-9948

  • Versions affected: WebKitGTK before 2.30.0 and WPE WebKit before 2.30.0.
  • Credit to Brendan Draper (@6r3nd4n) working with Trend Micro Zero Day Initiative.
  • Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Description: A type confusion issue was addressed with improved memory handling.

• CVE-2020-9951

  • Versions affected: WebKitGTK before 2.30.0 and WPE WebKit before 2.30.0.
  • Credit to Marcin ‘Icewall’ Noga of Cisco Talos.
  • Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Description: A use after free issue was addressed with improved memory management.

• CVE-2020-9952

  • Versions affected: WebKitGTK before 2.28.3 and WPE WebKit before 2.28.3.
  • Credit to Ryan Pickren (ryanpickren.com).
  • Impact: Processing maliciously crafted web content may lead to a cross site scripting attack. Description: An input validation issue was addressed with improved input validation.

• CVE-2020-9983

  • Versions affected: WebKitGTK before 2.30.3 and WPE WebKit before 2.30.3.
  • Credit to zhunki.
  • Impact: Processing maliciously crafted web content may lead to code execution. Description: An out-of-bounds write issue was addressed with improved bounds checking.

We recommend updating to the latest stable versions of WebKitGTK and WPE WebKit. It is the best way to ensure that you are running safe versions of WebKit. Please check our websites for information about the latest stable releases.

Further information about WebKitGTK and WPE WebKit security advisories can be found at: https://webkitgtk.org/security.html or https://wpewebkit.org/security/.

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