Not rated
CVE-2021-20233 A flaw was found in grub2 in versions prior to 2.06
Description
A flaw was found in grub2 in versions prior to 2.06. Setparam_prefix() in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one byte for each quote in the input. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| grub2 | Versions not published |
Other CVEs of grub2
The 14 CVEs of grub2 →
CVE-2022-3775
When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and…
7.1
High
CVE-2022-2601
A buffer overflow was found in grub_font_construct_glyph()
8.6
High
CVE-2021-3697
A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written…
Not rated
CVE-2021-3696
A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader
Not rated