Integer overflow in GNU Grub2
CVE-2022-28733
Integer underflow in grub_net_recv_ip4_packets; A malicious crafted IP packet can lead to an integer underflow in grub_net_recv_ip4_packets() function on rsm->total_len value. Under certain circumstances the total_len value may end up wrapping around to a small integer number which will be used in memory allocation. If the attack succeeds in such way, subsequent operations can write past the end of the buffer.
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: 0.013 (69.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- GNU Grub2
- GNU Project Grub — versions 0
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/
Frequently asked questions
- What is CVE-2022-28733?
- CVE-2022-28733 is a high-severity vulnerability in GNU Grub2, classified under Integer Underflow. CVSS score: 8.1/10. Published 2023-07-20.
- How severe is CVE-2022-28733?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2022-28733 known to be exploited?
- 18 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.