CVE-2020-14308: Integer Overflow
First published: Mon Jun 29 2020(Updated: )
A flaw was found in current grub2 versions as shipped with Red Hat Enterprise Linux 7 and 8, where the grub memory allocator doesn't check for possible arithmetic overflows on the requested allocation size. This issue leads the function to return invalid memory allocations, causing heap-based overflows in several code paths. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/fwupdate | <0:12-6.el7_8 | 0:12-6.el7_8 |
| redhat/grub2 | <1:2.02-0.86.el7_8 | 1:2.02-0.86.el7_8 |
| redhat/shim | <0:15-7.el7_9 | 0:15-7.el7_9 |
| redhat/shim-signed | <0:15-7.el7_8 | 0:15-7.el7_8 |
| redhat/grub2 | <1:2.02-0.86.el7_2 | 1:2.02-0.86.el7_2 |
| redhat/shim | <0:15-8.el7 | 0:15-8.el7 |
| redhat/shim-signed | <0:15-8.el7_2 | 0:15-8.el7_2 |
| redhat/grub2 | <1:2.02-0.86.el7 | 1:2.02-0.86.el7 |
| redhat/shim-signed | <0:15-8.el7_3 | 0:15-8.el7_3 |
| redhat/fwupdate | <0:9-10.el7_4 | 0:9-10.el7_4 |
| redhat/grub2 | <1:2.02-0.86.el7_4 | 1:2.02-0.86.el7_4 |
| redhat/shim-signed | <0:15-8.el7_4 | 0:15-8.el7_4 |
| redhat/fwupdate | <0:12-6.el7_6 | 0:12-6.el7_6 |
| redhat/grub2 | <1:2.02-0.86.el7_6 | 1:2.02-0.86.el7_6 |
| redhat/shim-signed | <0:15-8.el7_6 | 0:15-8.el7_6 |
| redhat/fwupdate | <0:12-6.el7_7 | 0:12-6.el7_7 |
| redhat/grub2 | <1:2.02-0.86.el7_7 | 1:2.02-0.86.el7_7 |
| redhat/shim-signed | <0:15-8.el7_7 | 0:15-8.el7_7 |
| redhat/fwupd | <0:1.1.4-7.el8_2 | 0:1.1.4-7.el8_2 |
| redhat/grub2 | <1:2.02-87.el8_2 | 1:2.02-87.el8_2 |
| redhat/shim | <0:15-14.el8_2 | 0:15-14.el8_2 |
| redhat/shim-unsigned-x64 | <0:15-7.el8 | 0:15-7.el8 |
| redhat/fwupd | <0:1.1.4-2.el8_0 | 0:1.1.4-2.el8_0 |
| redhat/grub2 | <1:2.02-87.el8_0 | 1:2.02-87.el8_0 |
| redhat/shim | <0:15-14.el8_0 | 0:15-14.el8_0 |
| redhat/fwupd | <0:1.1.4-2.el8_1 | 0:1.1.4-2.el8_1 |
| redhat/grub2 | <1:2.02-87.el8_1 | 1:2.02-87.el8_1 |
| redhat/shim | <0:15-14.el8_1 | 0:15-14.el8_1 |
| Gnu Grub2 | <2.06 | |
| openSUSE Leap | =15.1 | |
| openSUSE Leap | =15.2 | |
| redhat/grub | <2.06 | 2.06 |
| debian/grub2 | 2.06-3~deb11u6 2.06-13+deb12u1 2.12-5 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-14308 https://nvd.nist.gov/vuln/detail/CVE-2020-14308
- https://bugzilla.redhat.com/show_bug.cgi?id=1852009
- https://access.redhat.com/errata/RHSA-2020:3217
- https://access.redhat.com/errata/RHSA-2020:3273
- https://access.redhat.com/errata/RHSA-2020:3276
- https://access.redhat.com/errata/RHSA-2020:3275
- https://access.redhat.com/errata/RHSA-2020:3271
- https://access.redhat.com/errata/RHSA-2020:3274
- https://access.redhat.com/errata/RHSA-2020:3216
- https://access.redhat.com/errata/RHSA-2020:3227
- https://access.redhat.com/errata/RHSA-2020:3223
- https://access.redhat.com/security/cve/cve-2020-14308
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
- http://www.openwall.com/lists/oss-security/2020/07/29/3
- http://www.openwall.com/lists/oss-security/2021/09/17/2
- http://www.openwall.com/lists/oss-security/2021/09/17/4
- http://www.openwall.com/lists/oss-security/2021/09/21/1
- https://security.gentoo.org/glsa/202104-05
- https://security.netapp.com/advisory/ntap-20200731-0008/
- https://usn.ubuntu.com/4432-1/
- https://launchpad.net/bugs/cve/CVE-2020-14308
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1863017
- https://www.openwall.com/lists/oss-security/2020/07/29/3
- https://git.savannah.gnu.org/gitweb/?p=grub.git;a=commit;h=f725fa7cb2ece547c5af01eeeecfe8d95802ed41
- https://security-tracker.debian.org/tracker/CVE-2020-14308
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14308
- https://nvd.nist.gov/vuln/detail/CVE-2020-14308
- https://ubuntu.com/security/CVE-2020-14308
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2020-14308?
CVE-2020-14308 is a vulnerability in grub2, the GRand Unified Bootloader, which allows for heap-based overflow due to a flaw in the memory allocator.
How does CVE-2020-14308 affect Red Hat Enterprise Linux?
CVE-2020-14308 affects Red Hat Enterprise Linux 7 and 8, as it is present in the shipped versions of grub2.
What is the severity of CVE-2020-14308?
CVE-2020-14308 has a severity level of medium with a CVSS score of 6.4.
How can I fix CVE-2020-14308?
To fix CVE-2020-14308, you need to update grub2 to version 2.06 or higher.
Where can I find more information about CVE-2020-14308?
You can find more information about CVE-2020-14308 on the Red Hat Security Advisory and CVE websites.
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