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CVE-2022-3775

Quick assessment

Affected
n/a grub2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

grub2是美国GNU社区的一款Linux系统引导程序。 grub2存在缓冲区错误漏洞，该漏洞源于其字体代码呈现某些unicode序列时，它无法正确验证字体的宽度和高度。这些值进一步用于访问字体缓冲区，可能导致越界写入。攻击者可能设计一种能够触发此问题的字体，允许在未经授权的内存段中进行修改，导致数据完整性问题或导致拒绝服务。

AI Predicted 7.8 Difficulty: Hard EPSS 1.04% · P63

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
n/a grub2 All up to 2.06 affected
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I. Basic Information for CVE-2022-3775

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
grub2 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
grub2是美国GNU社区的一款Linux系统引导程序。 grub2存在缓冲区错误漏洞，该漏洞源于其字体代码呈现某些unicode序列时，它无法正确验证字体的宽度和高度。这些值进一步用于访问字体缓冲区，可能导致越界写入。攻击者可能设计一种能够触发此问题的字体，允许在未经授权的内存段中进行修改，导致数据完整性问题或导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- grub2 All up to 2.06 -

II. Public POCs for CVE-2022-3775

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III. Intelligence Information for CVE-2022-3775

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Vendor Advisories for CVE-2022-3775 (2)

Same Patch Batch · n/a · 2022-12-19 · 23 CVEs total

CVE-2021-4259 5.0 MEDIUM phpRedisAdmin login.inc.php authHttpDigest wrong operator in string comparison
CVE-2022-47551 Apiman 安全漏洞
CVE-2016-20018 knex.js SQL注入漏洞
CVE-2022-47549 OP-TEE Trusted OS 数据伪造问题漏洞
CVE-2022-47547 GossipSub 安全漏洞
CVE-2022-46403 Microchip RN4870 安全漏洞
CVE-2022-46402 Microchip RN4870 安全漏洞
CVE-2022-46401 Microchip RN4870 安全漏洞
CVE-2022-46400 Microchip RN4870 安全漏洞
CVE-2022-46399 Microchip RN4870 安全漏洞
CVE-2022-45041 xinhu OA SQL注入漏洞
CVE-2022-44940 PatchELF 缓冲区错误漏洞
CVE-2022-44109 pdftojson 缓冲区错误漏洞
CVE-2022-44108 pdftojson 缓冲区错误漏洞
CVE-2022-43289 Deark 缓冲区错误漏洞
CVE-2022-42947 Autodesk Maya 缓冲区错误漏洞
CVE-2022-42946 Autodesk Maya 缓冲区错误漏洞
CVE-2022-42945 Autodesk DWG TrueView 代码问题漏洞
CVE-2022-41418 BlogEngine 路径遍历漏洞
CVE-2022-40435 Employee Performance Evaluation System 跨站脚本漏洞

Showing top 20 of 23 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: grub2
Same vendor: n/a
Same weakness: CWE-787

V. Comments for CVE-2022-3775

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