WebKitGTK and WPE WebKit Security Advisory WSA-2021-0002

• Date Reported: March 22, 2021

• Advisory ID: WSA-2021-0002

• CVE identifiers: CVE-2020-27918, CVE-2020-29623, CVE-2020-9947, CVE-2021-1765, CVE-2021-1789, CVE-2021-1799, CVE-2021-1801, CVE-2021-1870.

Several vulnerabilities were discovered in WebKitGTK and WPE WebKit.

• CVE-2020-27918

  • Versions affected: WebKitGTK before 2.30.6 and WPE WebKit before 2.30.6.
  • Credit to Liu Long of Ant Security Light-Year Lab.
  • 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-2020-29623

  • Versions affected: WebKitGTK before 2.30.6 and WPE WebKit before 2.30.6.
  • Credit to Simon Hunt of OvalTwo LTD.
  • Impact: A user may be unable to fully delete browsing history. Description: “Clear History and Website Data” did not clear the history in some circumstances. The issue was addressed with improved data deletion.

• CVE-2020-9947

  • Versions affected: WebKitGTK before 2.30.0 and WPE WebKit before 2.30.0.
  • Credit to cc working with Trend Micro Zero Day Initiative.
  • 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-2021-1765

  • Versions affected: WebKitGTK before 2.30.6 and WPE WebKit before 2.30.6.
  • Credit to Eliya Stein of Confiant.
  • Impact: Maliciously crafted web content may violate iframe sandboxing policy. Description: This issue was addressed with improved iframe sandbox enforcement.

• CVE-2021-1789

  • Versions affected: WebKitGTK before 2.30.6 and WPE WebKit before 2.30.6.
  • Credit to @S0rryMybad of 360 Vulcan Team.
  • Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Description: A type confusion issue was addressed with improved state handling.

• CVE-2021-1799

  • Versions affected: WebKitGTK before 2.30.6 and WPE WebKit before 2.30.6.
  • Credit to Gregory Vishnepolsky & Ben Seri of Armis Security, and Samy Kamkar.
  • Impact: A malicious website may be able to access restricted ports on arbitrary servers, Description: A port redirection issue was addressed with additional port validation.

• CVE-2021-1801

  • Versions affected: WebKitGTK before 2.30.6 and WPE WebKit before 2.30.6.
  • Credit to Eliya Stein of Confiant.
  • Impact: Maliciously crafted web content may violate iframe sandboxing policy. Description: This issue was addressed with improved iframe sandbox enforcement.

• CVE-2021-1870

  • Versions affected: WebKitGTK before 2.30.6 and WPE WebKit before 2.30.6.
  • Credit to an anonymous researcher.
  • Impact: A remote attacker may be able to cause arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited. Description: A logic issue was addressed with improved restrictions.

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/.