VAR-202104-0159

Vulnerability from variot - Updated: 2024-11-23 19:48

An out-of-bounds write was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, macOS Big Sur 11.0.1. Processing a maliciously crafted font file may lead to arbitrary code execution. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Apple macOS. Interaction with the libFontParser library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.The specific flaw exists within the parsing of TTF fonts. Crafted data in a TTF font can trigger a write past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of the current process. Apple macOS is a set of dedicated operating systems developed by Apple Corporation for Mac computers. A buffer error vulnerability exists in Apple macOS. The vulnerability stems from an unknown function of FontParser. Entering unknown operations will result in memory corruption. Apple macOS could allow a remote authenticated malicious user to gain elevated privileges on the system, caused by an out-of-bounds write in the parsing of TTF fonts

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Detection rules are retrieved from Rulezet.