#VU79752 NULL pointer dereference in radare2 - CVE-2022-4843

Vulnerability identifier: #VU79752

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-4843

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
radare2
Universal components / Libraries / Software for developers

Vendor: Radare

Description

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

The vulnerability exists due to a NULL pointer dereference error within the r_io_bank_read_at() function in io_bank.c. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

radare2: 5.0.0 - 5.8.0

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External links
https://huntr.dev/bounties/075b2760-66a0-4d38-b3b5-e9934956ab7f
https://github.com/radareorg/radare2/commit/842f809d4ec6a12af2906f948657281c9ebc8a24
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OFCCTYAD7ASNQ23ABCUPAZHEDEIOCW6T/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FOXRDPI3OYYKO4PKXE3XD2IFONL6BCHR/

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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.