Vulnerability CVE-2020-14310


Published: 2020-07-31

Description:
There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the value from the font value. An attacker may leverage that by crafting a malicious font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow, zero-sized allocation and further 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-2020-14310
https://usn.ubuntu.com/4432-1/

Copyright 2020, cxsecurity.com

 

Back to Top