CVE-2020-10702

A flaw was found in QEMU in the implementation of the Pointer Authentication (PAuth) support for ARM introduced in version 4.0 and fixed in version 5.0.0. A general failure of the signature generation process caused every PAuth-enforced pointer to be signed with the same signature. A local attacker could obtain the signature of a protected pointer and abuse this flaw to bypass PAuth protection for all programs running on QEMU.

A flaw was found in QEMU in the implementation of the Pointer Authentication (PAuth) support for ARM introduced in version 4.0 and fixed in version 5.0.0. A general failure of the signature generation process caused every PAuth-enforced pointer to be signed with the same signature. A local attacker could obtain the signature of a protected pointer and abuse this flaw to bypass PAuth protection for all programs running on QEMU.

Se encontró un fallo en QEMU en la implementación del soporte Pointer Authentication (PAuth) para ARM introducido en la versión 4.0 y corregido en la versión 5.0.0. Un fallo general del proceso de generación de firmas causó que cada puntero aplicado por PAuth se firmara con la misma firma. Un atacante local podría obtener la firma de un puntero protegido y abusar de este fallo para omitir la protección de PAuth para todos los programas que se ejecutan en QEMU