Medium severity · published Jul 31, 2020
CVE-2020-14311
There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems
6.0
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
Enterprise Linux · Redhat
7.0; 8.0 · source: NVD
EL
Enterprise Linux Eus · Redhat
8.1; 8.2 · source: NVD
EL
Enterprise Linux Server Aus · Redhat
8.2 · source: NVD
EL
Enterprise Linux Server Tus · Redhat
8.2 · source: NVD
GR
Grub2 · Gnu
before 2.06 · source: NVD
LE
Leap · Opensuse
15.1; 15.2 · source: NVD
UL
Ubuntu Linux · Canonical
14.04; 16.04; 18.04; 20.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-14311
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-14311
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
Mailing List
http://www.openwall.com/lists/oss-security/2021/09/17/2
Mailing List
http://www.openwall.com/lists/oss-security/2021/09/17/4
Mailing List
http://www.openwall.com/lists/oss-security/2021/09/21/1
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311
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