Buffer overflow in Ntp

CVE-2023-26553

mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when copying the trailing number. An adversary may be able to attack a client ntpq process, but cannot attack ntpd.

Vulnerability class: Buffer Overflow

EPSS: 0.007 (49.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

  • Ntp — versions 4.2.8
  • N/a — versions n/a

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2023-26553?
CVE-2023-26553 is a medium-severity vulnerability in Ntp, classified under Out-of-bounds Write. CVSS score: 5.6/10. Published 2023-04-11.
How severe is CVE-2023-26553?
Medium severity. CVSS v3 base score is 5.6 out of 10.