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Vulnerability of pngcheck: buffer overflow via Invalid MNG PPLT Chunk

Synthesis of the vulnerability 

An attacker can trigger a buffer overflow via Invalid MNG PPLT Chunk of pngcheck, in order to trigger a denial of service, and possibly to run code.
Impacted systems: Fedora.
Severity of this alert: 2/4.
Creation date: 09/02/2021.
Références of this alert: FEDORA-2021-674d704f6c, FEDORA-2021-e24167b0e8, VIGILANCE-VUL-34517.

Description of the vulnerability 

An attacker can trigger a buffer overflow via Invalid MNG PPLT Chunk of pngcheck, in order to trigger a denial of service, and possibly to run code.
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This security weakness impacts software or systems such as Fedora.

Our Vigil@nce team determined that the severity of this threat bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of document.

An attacker with a expert ability can exploit this threat.

Solutions for this threat 

Fedora 32-33: new pngcheck packages.
New packages are available:
  Fedora 32: pngcheck 2.4.0-7.fc32
  Fedora 33: pngcheck 2.4.0-7.fc33
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