Vulnerability CVE-2020-14311


Published: 2020-07-31

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.

Type:

CWE-787

CVSS2 => (AV:L/AC:L/Au:N/C:N/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
3.6/10
4.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
Partial
Affected software
Redhat -> Enterprise linux 
Redhat -> Enterprise linux eus 
Redhat -> Enterprise linux server aus 
Redhat -> Enterprise linux server tus 
GNU -> Grub2 

 References:
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311
https://usn.ubuntu.com/4432-1/

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