Buffer overflow in NTP
CVE-2009-1252
Stack-based buffer overflow in the crypto_recv function in ntp_crypto.c in ntpd in NTP before 4.2.4p7 and 4.2.5 before 4.2.5p74, when OpenSSL and autokey are enabled, allows remote attackers to execute arbitrary code via a crafted packet containing an extension field.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v2 metric
CVSS v2 base score 6.8 (Medium). Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.213 (97.5th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.211 · newest: 0.213 · change: +0.002
Affected products
- NTP — versions 4.2.4p0, 4.2.4p1, 4.2.4p2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- usn.ubuntu.com/777-1/ (vendor-advisory)
- secunia.com/advisories/35137 (third-party-advisory)
- secunia.com/advisories/35166 (third-party-advisory)
- secunia.com/advisories/37470 (third-party-advisory)
- secunia.com/advisories/35388 (third-party-advisory)
- secunia.com/advisories/35243 (third-party-advisory)
- secunia.com/advisories/37471 (third-party-advisory)
- www.debian.org/security/2009/dsa-1801 (vendor-advisory)
- www.redhat.com/archives/fedora-package-announce/2009-May/msg01449.html (vendor-advisory)
- secunia.com/advisories/35308 (third-party-advisory)
Frequently asked questions
- What is CVE-2009-1252?
- CVE-2009-1252 is a vulnerability in NTP, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2009-05-19.
- Is CVE-2009-1252 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.