CVE-2020-14311
Published: August 31, 2023Last modified: August 31, 2023
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.
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6 |
Attack Vector | LOCAL |
Attack complexity | LOW |
Privileges required | HIGH |
User interaction | NONE |
Scope | UNCHANGED |
Confidentiality | NONE |
Integrity impact | HIGH |
Availability impact | HIGH |
Vector | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H |
Status
Product | Release | Package | Status |
---|---|---|---|
Alpaquita Linux | 23 LTS | grub | Not affected (2.06-r15) |
Stream | grub | Not affected (2.06-r17) |
References
- 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/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://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311
- https://security.gentoo.org/glsa/202104-05
- https://usn.ubuntu.com/4432-1/