Описание
There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the value from the font value. An attacker may leverage that by crafting a malicious font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow, zero-sized allocation and further heap-based buffer overflow.
Ссылки
- Mailing ListThird Party Advisory
- Mailing ListThird Party Advisory
- Issue TrackingVendor Advisory
- Third Party Advisory
- Third Party Advisory
- Mailing ListThird Party Advisory
- Mailing ListThird Party Advisory
- Issue TrackingVendor Advisory
- Third Party Advisory
- Third Party Advisory
Уязвимые конфигурации
Одно из
Одно из
Одно из
EPSS
5.7 Medium
CVSS3
6 Medium
CVSS3
3.6 Low
CVSS2
Дефекты
Связанные уязвимости
There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the value from the font value. An attacker may leverage that by crafting a malicious font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow, zero-sized allocation and further heap-based buffer overflow.
There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the value from the font value. An attacker may leverage that by crafting a malicious font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow, zero-sized allocation and further heap-based buffer overflow.
There is an issue on grub2 before version 2.06 at function read_sectio ...
There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the value from the font value. An attacker may leverage that by crafting a malicious font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow, zero-sized allocation and further heap-based buffer overflow.
Уязвимость реализации функции read_section_as_string() загрузчика операционных систем Grub2, позволяющая нарушителю оказать влияние на целостность данных или вызвать отказ в обслуживании
EPSS
5.7 Medium
CVSS3
6 Medium
CVSS3
3.6 Low
CVSS2