Buffer overflow in NTP
CVE-2023-26555
praecis_parse in ntpd/refclock_palisade.c in NTP 4.2.8p15 has an out-of-bounds write. Any attack method would be complex, e.g., with a manipulated GPS receiver.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (41.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: -0.000
Affected products
- NTP — versions 4.2.8
Weakness classification (CWE)
References
- github.com/spwpun/ntp-4.2.8p15-cves/blob/main/CVE-2023-26555 (Third Party Advisory)
- github.com/spwpun/ntp-4.2.8p15-cves/issues/1 (Issue Tracking)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2023-26555?
- CVE-2023-26555 is a medium-severity vulnerability in NTP, classified under Out-of-bounds Write. CVSS score: 6.4/10. Published 2023-04-11.
- How severe is CVE-2023-26555?
- Medium severity. CVSS v3 base score is 6.4 out of 10.