Vulnerability Details : 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. 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.
Published 2020-07-30 13:15:11
Updated 2022-04-28 18:58:26
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: OverflowMemory Corruption

Products affected by CVE-2020-14309

Exploit prediction scoring system (EPSS) score for CVE-2020-14309

EPSS FAQ
0.05%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 14 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-14309

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.6
 MEDIUM AV:L/AC:L/Au:N/C:P/I:P/A:P
3.9
6.4
 NIST
6.7
 MEDIUM CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
0.8
5.9
 NIST

CWE ids for CVE-2020-14309

  • The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
    Assigned by: nvd@nist.gov (Primary)
  • The product writes data past the end, or before the beginning, of the intended buffer.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-14309

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