Login Request a demo
Medium severity · published Jul 30, 2020
CVE-2020-14309
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
6.7
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
Grub2 · Gnu
before 2.06 · source: NVD
LE
Leap · Opensuse
15.1; 15.2 · source: NVD
Affected product
GR
Grub2
Gnu
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-14309
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-14309
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1852022
Third Party Advisory
https://security.gentoo.org/glsa/202104-05
Third Party Advisory
https://security.netapp.com/advisory/ntap-20200731-0008/
Third Party Advisory
https://usn.ubuntu.com/4432-1/
More from Grub2
8.8
CVE-2024-56737
GNU GRUB (aka GRUB2) through 2.12 has a heap-based buffer overflow in fs/hfs.c via crafted sblock data in an HFS filesystem
8.6
CVE-2022-2601
A buffer overflow was found in grub_font_construct_glyph()
8.2
CVE-2021-20233
A flaw was found in grub2 in versions prior to 2.06
8.2
CVE-2020-25632
A flaw was found in grub2 in versions prior to 2.06
8.2
CVE-2020-10713
A flaw was found in grub2, prior to version 2.06