#VU65855 Input validation error in protobuf-c - CVE-2022-33070

Vulnerability identifier: #VU65855

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-33070

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
protobuf-c
Other software / Other software solutions

Vendor: protobuf-c

Description

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

The vulnerability exists due to insufficient validation of user-supplied input within the parse_tag_and_wiretype() function in protobuf-c/protobuf-c.c. A remote attacker can trick the victim to open a specially crafted file, cause an invalid arithmetic shift and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

protobuf-c: 0.15 - 1.4.0

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External links
https://github.com/protobuf-c/protobuf-c/pull/508
https://github.com/protobuf-c/protobuf-c/issues/506

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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.