CVE-2020-14309: Buffer Overflow
First published: Mon Jun 29 2020(Updated: )
A flaw was found in grub2. When handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size, the name size leads to an arithmetic overflow leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled data. The highest threat from this vulnerability is to data confidentiality and 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-2020-14309 https://nvd.nist.gov/vuln/detail/CVE-2020-14309
- https://bugzilla.redhat.com/show_bug.cgi?id=1852022
- 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-2020-14309
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
- 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-2020-14309
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1863019
- https://www.openwall.com/lists/oss-security/2020/07/29/3
- https://git.savannah.gnu.org/gitweb/?p=grub.git;a=commit;h=3f05d693d1274965ffbe4ba99080dc2c570944c6
- https://security-tracker.debian.org/tracker/CVE-2020-14309
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14309
- https://nvd.nist.gov/vuln/detail/CVE-2020-14309
- https://ubuntu.com/security/CVE-2020-14309
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2020-14309?
CVE-2020-14309 is a vulnerability in grub2 that allows for a heap-based buffer overflow with attacker controlled data.
How severe is CVE-2020-14309?
CVE-2020-14309 has a severity rating of 6.7, which is considered medium severity.
Which software versions are affected by CVE-2020-14309?
Grub2 versions before 2.06 are affected by CVE-2020-14309.
What is the remedy for CVE-2020-14309?
The remedy for CVE-2020-14309 is to update affected software versions to version 2.06.
Where can I find more information about CVE-2020-14309?
You can find more information about CVE-2020-14309 on the Red Hat Security Advisory page (RHSA-2020:3216) and the CVE page (CVE-2020-14309).
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