CVE-2020-14311

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.

References

https://www.tenable.com/blog/cve-2020-10713-boothole-grub2-bootloader-arbitrary-code-execution-vulnerability

https://usn.ubuntu.com/4432-1/

https://security.gentoo.org/glsa/202104-05

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311

http://www.openwall.com/lists/oss-security/2021/09/21/1

http://www.openwall.com/lists/oss-security/2021/09/17/4

http://www.openwall.com/lists/oss-security/2021/09/17/2

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3