CVE-2022-28733: Integer underflow in grub_net_recv_ip4_packets
First published: Mon May 09 2022(Updated: )
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.
Credit: security@ubuntu.com security@ubuntu.com security@ubuntu.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/grub2 | <1:2.02-0.87.el7_9.11 | 1:2.02-0.87.el7_9.11 |
| redhat/grub2 | <1:2.02-123.el8_6.8 | 1:2.02-123.el8_6.8 |
| redhat/grub2 | <1:2.02-87.el8_1.10 | 1:2.02-87.el8_1.10 |
| redhat/grub2 | <1:2.02-87.el8_2.10 | 1:2.02-87.el8_2.10 |
| redhat/grub2 | <1:2.02-99.el8_4.9 | 1:2.02-99.el8_4.9 |
| redhat/grub2 | <1:2.06-27.el9_0.7 | 1:2.06-27.el9_0.7 |
| ubuntu/grub2 | <2.06-3 | 2.06-3 |
| Gnu Grub2 | >=2.00<2.06-3 | |
| debian/grub2 | 2.06-3~deb10u1 2.06-3~deb10u3 2.06-3~deb11u5 2.06-3~deb11u4 2.06-13 2.12~rc1-9 |
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Reference Links
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28733
- https://www.openwall.com/lists/oss-security/2022/06/07/5
- https://security.netapp.com/advisory/ntap-20230825-0002/
- https://launchpad.net/bugs/cve/CVE-2022-28733
- https://access.redhat.com/errata/RHSA-2022:5098
- https://access.redhat.com/errata/RHSA-2022:5096
- https://access.redhat.com/errata/RHSA-2022:5099
- https://access.redhat.com/errata/RHSA-2022:5095
- https://access.redhat.com/errata/RHSA-2022:5100
- https://access.redhat.com/security/cve/cve-2022-28733
- https://access.redhat.com/errata/RHSA-2022:5678
- https://access.redhat.com/errata/RHSA-2022:8900
- https://bugzilla.redhat.com/show_bug.cgi?id=2083339
- https://www.cve.org/CVERecord?id=CVE-2022-28733 https://nvd.nist.gov/vuln/detail/CVE-2022-28733
- https://security-tracker.debian.org/tracker/CVE-2022-28733
- https://nvd.nist.gov/vuln/detail/CVE-2022-28733
- https://ubuntu.com/security/CVE-2022-28733
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the vulnerability ID of this flaw?
The vulnerability ID of this flaw is CVE-2022-28733.
How does this vulnerability affect the affected software?
This vulnerability affects the affected software by allowing an attacker to craft a malicious packet that triggers an integer underflow in the grub code.
What is the severity of CVE-2022-28733?
The severity of CVE-2022-28733 is high with a CVSSv3 score of 8.1.
What is the recommended remedy for this vulnerability?
The recommended remedy for this vulnerability is to update the affected software to version 1:2.02-0.87.el7_9.11 for Red Hat, 1:2.02-123.el8_6.8 for Red Hat, and 1:2.02-87.el8_1.10 for Red Hat, among others.
Where can I find more information about CVE-2022-28733?
You can find more information about CVE-2022-28733 on the MITRE CVE website, the NVD website, and the Openwall mailing list.
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