Buffer overflow in GNU Grub2
CVE-2022-28734
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.011 (65.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2022/06/07/5 (mailing-list, Mailing List, Third Party Advisory)
- cve.mitre.org/cgi-bin/cvename.cgi (issue-tracking, Third Party Advisory)
- security.netapp.com/advisory/ntap-20230825-0002/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2022-28734?
- CVE-2022-28734 is a high-severity vulnerability in GNU Grub2, classified under Out-of-bounds Write. CVSS score: 8.1/10. Published 2023-07-20.
- How severe is CVE-2022-28734?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2022-28734 known to be exploited?
- 18 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.