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5.6
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.
CVE-2023-26553 · published 3 years ago
Summary
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.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| ntp | ntp |
4.2.8 cpe:2.3:a:ntp:ntp:4.2.8:p15:*:*:*:*:*:* |
Original advisory text
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.
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.
References
- 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
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker partial control
Type
CWE-787Out-of-bounds Write
Timeline
Published11 Apr 2023
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2023-26553 · NVD
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