[webkit-changes] [WebKit/WebKit] 5bd79f: Crash in Vector::expandCapacity; WebCore::ISOFairP...

[Jer Noble]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 5bd79f324bc5a3aaf8d101087e277b5c611dfbf7
      https://github.com/WebKit/WebKit/commit/5bd79f324bc5a3aaf8d101087e277b5c611dfbf7
  Author: Jer Noble <jer.noble at apple.com>
  Date:   2023-10-19 (Thu, 19 Oct 2023)

  Changed paths:
    M Source/WebCore/platform/graphics/iso/ISOBox.cpp

  Log Message:
  -----------
  Crash in Vector::expandCapacity; WebCore::ISOFairPlayStreamingKeyContextBox::parse()
https://bugs.webkit.org/show_bug.cgi?id=258712
rdar://111171940

Reviewed by Youenn Fablet.

In a number of cases, malformed or malicious boxes claim to have a size much larger
than the memory passed to the parser. Cap the m_size parameter to the remaining size
of the memory buffer to avoid situations where we attempt to create a vector big
enough to hold MAX_INT entries.

* Source/WebCore/platform/graphics/iso/ISOBox.cpp:
(WebCore::ISOBox::peekBox):
(WebCore::ISOBox::parse):

Canonical link: https://commits.webkit.org/265870.2@safari-7616-branch

Canonical link: https://commits.webkit.org/269539@main