Several vulnerabilities in Radare2

Published: 2023-08-21

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-32494 CVE-2021-32495
CWE-ID	CWE-369 CWE-416
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	radare2 Universal components / Libraries / Software for developers
Vendor	Radare

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Division by zero

EUVDB-ID: #VU79758

Risk: Low

CVSSv4.0: 1.2 [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]

CVE-ID: CVE-2021-32494

CWE-ID: CWE-369 - Divide By Zero

Exploit availability: No

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

radare2: 4.0.0 - 5.2.1

CPE2.3

External links

https://github.com/radareorg/radare2/issues/18667
https://github.com/radareorg/radare2/commit/a07dedb804a82bc01c07072861942dd80c6b6d62

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Use-after-free

EUVDB-ID: #VU79757

Risk: High

CVSSv4.0: 6.1 [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]

CVE-ID: CVE-2021-32495

CWE-ID: CWE-416 - Use After Free