CVE-2023-26553

low-risk
Published 2023-04-11

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.

Do I need to act?

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0.47% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.6/10 Medium
NETWORK / HIGH complexity

Affected Products (1)

Ntp

Affected Vendors

Ntp

References (4)

Third Party Advisory https://github.com/spwpun/ntp-4.2.8p15-cves/blob/main/CVE-2023-26553
Third Party Advisory https://github.com/spwpun/ntp-4.2.8p15-cves/issues/1#issuecomment-1506667321
Third Party Advisory https://github.com/spwpun/ntp-4.2.8p15-cves/blob/main/CVE-2023-26553
Third Party Advisory https://github.com/spwpun/ntp-4.2.8p15-cves/issues/1#issuecomment-1506667321
25
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 2/34 · Minimal
Exposure 5/34 · Minimal