CVE-2022-3775
grub2: Heap based out-of-bounds write when redering certain unicode sequences
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.
Al representar ciertas secuencias Unicode, el código de fuente de grub2 no se valida correctamente si el ancho y alto del glifo informado están restringidos dentro del tamaño del mapa de bits. Como consecuencia, un atacante puede crear una entrada que provocará una escritura fuera de los límites en el montón de grub2, lo que provocará daños en la memoria y problemas de disponibilidad. Aunque es compleja, no se puede descartar la ejecución de código arbitrario.
A flaw was found in the grub2 font code. When rendering certain unicode sequences, it fails to properly validate the font width and height. These values are further used to access the font buffer, causing possible out-of-bounds writes. A malicious actor may craft a font capable of triggering this issue, allowing modifications in unauthorized memory segments, causing data integrity problems or leading to denial of service.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2022-10-31 CVE Reserved
- 2022-11-16 CVE Published
- 2024-07-11 EPSS Updated
- 2024-08-03 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-787: Out-of-bounds Write
CAPEC
References (4)
| URL | Tag | Source |
|---|---|---|
| https://access.redhat.com/security/cve/cve-2022-3775 | Third Party Advisory |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://security.gentoo.org/glsa/202311-14 | 2023-11-25 | |
| https://access.redhat.com/security/cve/CVE-2022-3775 | 2023-02-14 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2138880 | 2023-02-14 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Gnu Search vendor "Gnu" | Grub2 Search vendor "Gnu" for product "Grub2" | <= 2.06 Search vendor "Gnu" for product "Grub2" and version " <= 2.06" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Affected
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