What’s Vulnerable › Vulnerabilities
CVE-2022-28734: Out-of-bounds write when handling split HTTP headers
- Severity: high (CVSS 7.0 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2023-07-20 · updated 2026-06-17
- Weakness: CWE-787
Description
Out-of-bounds write when handling split HTTP headers; When handling split HTTP headers, GRUB2 HTTP code accidentally moves its internal data buffer point by one position. This can lead to a out-of-bound write further when parsing the HTTP request, writing a NULL byte past the buffer. It's conceivable that an attacker controlled set of packets can lead to corruption of the GRUB2's internal memory metadata.
Affected products
- grub2: from 2.00 before 2.06-3 — fixed in 2.06-3
- Active IQ Unified Manager for VMware vSphere, Linux, and Microsoft Windows: all versions
How to fix
Upgrade to a fixed version: grub2 2.06-3. Check the vendor advisory for mitigations.
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28734
- https://security.netapp.com/advisory/ntap-20230825-0002/
- https://www.openwall.com/lists/oss-security/2022/06/07/5
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28734
- https://security.netapp.com/advisory/ntap-20230825-0002/
- https://www.openwall.com/lists/oss-security/2022/06/07/5
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