CVE-2021-22570

Name	CVE-2021-22570
Description	Nullptr dereference when a null char is present in a proto symbol. The symbol is parsed incorrectly, leading to an unchecked call into the proto file's name during generation of the resulting error message. Since the symbol is incorrectly parsed, the file is nullptr. We recommend upgrading to version 3.15.0 or greater.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
protobuf (PTS)	buster	3.6.1.3-2	vulnerable
	bullseye	3.12.4-1	vulnerable
	bookworm, sid	3.21.12-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
protobuf	source	experimental	3.17.1-1
protobuf	source	(unstable)	3.21.9-3

Notes

[bullseye] - protobuf <no-dsa> (Minor issue)
[buster] - protobuf <no-dsa> (Minor issue)
[stretch] - protobuf <postponed> (Minor issue; clean crash / Dos; patch needs to be isolated)
Fixed upstream in v3.15.0: https://github.com/protocolbuffers/protobuf/releases/tag/v3.15.0