CVE-2022-28735
First published: Thu May 26 2022(Updated: )
The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.
Credit: security@ubuntu.com security@ubuntu.com security@ubuntu.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Gnu Grub2 | >=2.00<2.06-3 | |
| ubuntu/grub2 | <2.06-3 | 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 | |
| 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 |
| redhat/grub | <2.12 | 2.12 |
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Reference Links
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28735
- 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-2022-28735
- 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-2022-28735
- https://bugzilla.redhat.com/show_bug.cgi?id=2090857
- https://www.cve.org/CVERecord?id=CVE-2022-28735 https://nvd.nist.gov/vuln/detail/CVE-2022-28735
- https://security-tracker.debian.org/tracker/CVE-2022-28735
- https://nvd.nist.gov/vuln/detail/CVE-2022-28735
- https://ubuntu.com/security/CVE-2022-28735
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2022-28735?
CVE-2022-28735 is a vulnerability in grub2 that allows non-kernel files to be loaded on shim-powered secure boot systems, breaking the secure boot trust-chain.
What is the severity of CVE-2022-28735?
The severity of CVE-2022-28735 is high with a severity rating of 7.8.
Which software versions are affected by CVE-2022-28735?
The affected software versions by CVE-2022-28735 include Red Hat grub2 versions 1:2.02-123.el8_6.8, 1:2.02-87.el8_1.10, 1:2.02-87.el8_2.10, 1:2.02-99.el8_4.9, and 1:2.06-27.el9_0.7, as well as Gnu Grub2 versions up to 2.06-3, Ubuntu grub2 version 2.06-3, and Debian grub2 versions 2.06-3~deb10u1, 2.06-3~deb10u3, 2.06-3~deb11u5, 2.06-3~deb11u4, 2.06-13, and 2.12~rc1-9.
How does CVE-2022-28735 affect systems?
CVE-2022-28735 allows unverified code and modules to be loaded in GRUB2 on shim-powered secure boot systems, compromising the secure boot trust-chain.
How can CVE-2022-28735 be fixed?
To fix CVE-2022-28735, it is recommended to update the affected software versions to the patched versions provided by the respective software vendors.
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