Vulnerability Description
There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized memory allocation with subsequent heap-based buffer overflow.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Grub2 | < 2.06 |
| Redhat | Enterprise Linux | 7.0 |
| Redhat | Enterprise Linux Eus | 8.1 |
| Redhat | Enterprise Linux Server Aus | 8.2 |
| Redhat | Enterprise Linux Server Tus | 8.2 |
| Opensuse | Leap | 15.1 |
| Canonical | Ubuntu Linux | 14.04 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.htmlMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/17/2Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/17/4Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/21/1Mailing ListThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311Issue TrackingThird Party Advisory
- https://security.gentoo.org/glsa/202104-05Third Party Advisory
- https://usn.ubuntu.com/4432-1/Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.htmlMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/17/2Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/17/4Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/21/1Mailing ListThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311Issue TrackingThird Party Advisory
- https://security.gentoo.org/glsa/202104-05Third Party Advisory
FAQ
What is CVE-2020-14311?
CVE-2020-14311 is a vulnerability with a CVSS score of 5.7 (MEDIUM). There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leadi...
How severe is CVE-2020-14311?
CVE-2020-14311 has been rated MEDIUM with a CVSS base score of 5.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-14311?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Grub2, Redhat Enterprise Linux, Redhat Enterprise Linux Eus, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Tus.