CVE-2022-28733

Name	CVE-2022-28733
Description	Integer underflow in grub_net_recv_ip4_packets; A malicious crafted IP packet can lead to an integer underflow in grub_net_recv_ip4_packets() function on rsm->total_len value. Under certain circumstances the total_len value may end up wrapping around to a small integer number which will be used in memory allocation. If the attack succeeds in such way, subsequent operations can write past the end of the buffer.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
grub2 (PTS)	bullseye (security), bullseye	2.06-3~deb11u6	fixed
	bookworm, bookworm (security)	2.06-13+deb12u1	fixed
	forky, sid, trixie	2.12-9	fixed

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

Package	Type	Release	Fixed Version
grub2	source	buster	2.06-3~deb10u1
grub2	source	bullseye	2.06-3~deb11u1
grub2	source	(unstable)	2.06-3

Notes

[stretch] - grub2 <ignored> (No SecureBoot support in stretch)
[jessie] - grub2 <ignored> (No SecureBoot support in jessie)
https://www.openwall.com/lists/oss-security/2022/06/07/5