CVE-2022-28733 Information

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.

Reference

https://www.openwall.com/lists/oss-security/2022/06/07/5 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28733