Non notée
CVE-2020-27749 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. Variable names present are expanded in the supplied command line into their corresponding variable contents, using a 1kB stack buffer for temporary storage, without sufficient bounds checking. If the function is called with a command line that references a variable with a sufficiently large payload, it is possible to overflow the stack buffer, corrupt the stack frame and control execution which could also circumvent Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| grub2 | Versions non publiées |
Références
- bugzilla.redhat.com bugzilla.redhat.com
- FEDORA-2021-cab258a413 lists.fedoraproject.org
- GLSA-202104-05 security.gentoo.org
- security.netapp.com security.netapp.com
Chronologie
- Publiée
- Dernière modification
Autres CVE de grub2
Les 14 CVE de 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
Élevée
CVE-2022-2601
A buffer overflow was found in grub_font_construct_glyph()
8.6
Élevée
CVE-2021-3697
A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written…
Non notée
CVE-2021-3696
A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader
Non notée