CVE-2022-48303

Tar vulnerability

CVSS

5.5

EPSS

4.5%

EPSS pct

91th

Exploited

No known

GNU Tar through 1.34 has a one-byte out-of-bounds read that results in use of uninitialized memory for a conditional jump. Exploitation to change the flow of control has not been demonstrated. The issue occurs in from_header in list.c via a V7 archive in which mtime has approximately 11 whitespace characters.

Affected vendor

Gnu

Affected product

Tar

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness type (CWE)

CWE-125 — Out-of-bounds Read

Published

2023-01-30

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable with local access, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 4.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 91% of all scored CVEs.

Check your external exposure to CVE-2022-48303

Confirm whether Gnu Tar is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2022-48303.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2022-48303

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