SB2023082113 - Several vulnerabilities in Radare2

Description

This security bulletin contains information about 2 vulnerabilities.

1) Division by zero (CVE-ID: CVE-2021-32494)

CWE-ID: CWE-369 - Divide By Zero

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a division by zero error within the rebase_buffer() function. A remote attacker can pass specially crafted data to the application and crash it.

2) Use-after-free (CVE-ID: CVE-2021-32495)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error within the get_none_object() function in pyc parser. A remote attacker can pass specially crafted input to the application and execute arbitrary code.

Remediation

Install update from vendor's website.

References

• https://github.com/radareorg/radare2/issues/18667
• https://github.com/radareorg/radare2/commit/a07dedb804a82bc01c07072861942dd80c6b6d62
• https://github.com/radareorg/radare2/commit/5e16e2d1c9fe245e4c17005d779fde91ec0b9c05
• https://github.com/radareorg/radare2/issues/18666