CVE-2020-14309

medium

Description

There's an issue with grub2 in all versions before 2.06 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.

References

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

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

https://security.netapp.com/advisory/ntap-20200731-0008/

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

https://bugzilla.redhat.com/show_bug.cgi?id=1852022

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

Published: 2020-07-30

Updated: 2022-04-28

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 6.7

Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Severity: Medium