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Vulnerability of OpenSC: buffer overflow via sc_pkcs15emu_gemsafeGPK_init

Synthesis of the vulnerability 

An attacker can trigger a buffer overflow via sc_pkcs15emu_gemsafeGPK_init() of OpenSC, in order to trigger a denial of service, and possibly to run code.
Vulnerable software: Fedora, SUSE Linux Enterprise Desktop, SLES.
Severity of this announce: 2/4.
Creation date: 14/12/2020.
Références of this computer vulnerability: CVE-2020-26571, FEDORA-2020-7c80831ffe, SUSE-SU-2021:0998-1, VIGILANCE-VUL-34099.

Description of the vulnerability 

An attacker can trigger a buffer overflow via sc_pkcs15emu_gemsafeGPK_init() of OpenSC, in order to trigger a denial of service, and possibly to run code.
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This security vulnerability impacts software or systems such as Fedora, SUSE Linux Enterprise Desktop, SLES.

Our Vigil@nce team determined that the severity of this computer weakness 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 security note.

Solutions for this threat 

Fedora 33: new opensc packages.
New packages are available:
  Fedora 33: opensc 0.21.0-1.fc33

SUSE LE 12 SP5: new opensc packages.
New packages are available:
  SUSE LE 12 SP5: opensc 0.13.0-3.11.1
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