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CVE-2020-14311

Date: July 31, 2020

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.

Language: C

Severity Score

Related Resources (14)

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
https://security.alpinelinux.org/vuln/CVE-2020-14311
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://access.redhat.com/security/cve/CVE-2020-14311
https://nvd.nist.gov/vuln/detail/CVE-2020-14311
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-14311
https://security-tracker.debian.org/tracker/CVE-2020-14311
https://usn.ubuntu.com/4432-1/
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
http://www.openwall.com/lists/oss-security/2021/09/17/4
http://www.openwall.com/lists/oss-security/2021/09/17/2
https://www.mend.io/vulnerability-database/CVE-2020-14311

Severity Score

Weakness Type (CWE)

Integer Overflow or Wraparound

CWE-190

Out-of-bounds Write

CWE-787

Heap-based Buffer Overflow

CWE-122

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): HIGH
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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