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    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.

    Published:May 18, 2009
    Last Modified:Apr 23, 2026
    EPS:May 19, 2009
    EPSS Score:0.70247
    CVSS Score:6.8

    Affected Products

    Vendor
    Ntp
    Product
    Ntp
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Eus

    Exploits

    No exploit reference

    Related CVEs

    CVE-2023-26554 (CVSS 5.6) — mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when adding a '\0' character. An advers…
    CVE-2023-26555 (CVSS 6.4) — praecis_parse in ntpd/refclock_palisade.c in NTP 4.2.8p15 has an out-of-bounds write. Any attack method would …
    CVE-2023-26552 (CVSS 5.6) — mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when adding a decimal point. An adversa…
    CVE-2023-26553 (CVSS 5.6) — mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when copying the trailing number. An ad…
    CVE-2023-26551 (CVSS 5.6) — mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write in the cp<cpdec while loop. An adversar…
    CVE-2020-15025 (CVSS 4.4) — ntpd in ntp 4.2.8 before 4.2.8p15 and 4.3.x before 4.3.101 allows remote attackers to cause a denial of servic…
    CVE-2018-8956 (CVSS 5.3) — ntpd in ntp 4.2.8p10, 4.2.8p11, 4.2.8p12 and 4.2.8p13 allow remote attackers to prevent a broadcast client fro…
    CVE-2020-11868 (CVSS 7.5) — ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows an off-path attacker to block unauthenticated sync…
    CVE-2020-13817 (CVSS 7.4) — ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows remote attackers to cause a denial of service (dae…
    CVE-2019-11331 (CVSS 8.1) — Network Time Protocol (NTP), as specified in RFC 5905, uses port 123 even for modes where a fixed port number …

    References

    ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2009-006.txt.asc
    http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00003.html
    http://rhn.redhat.com/errata/RHSA-2009-1039.html
    http://rhn.redhat.com/errata/RHSA-2009-1040.html
    http://secunia.com/advisories/35137
    http://secunia.com/advisories/35138
    http://secunia.com/advisories/35166
    http://secunia.com/advisories/35169
    http://secunia.com/advisories/35243
    http://secunia.com/advisories/35253
    http://secunia.com/advisories/35308
    http://secunia.com/advisories/35336
    http://secunia.com/advisories/35388
    http://secunia.com/advisories/35416
    http://secunia.com/advisories/35630
    http://secunia.com/advisories/37470
    http://secunia.com/advisories/37471
    http://security.freebsd.org/advisories/FreeBSD-SA-09:11.ntpd.asc
    http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.566238
    http://wiki.rpath.com/wiki/Advisories:rPSA-2009-0092
    http://www.debian.org/security/2009/dsa-1801
    http://www.gentoo.org/security/en/glsa/glsa-200905-08.xml
    http://www.kb.cert.org/vuls/id/853097
    http://www.mandriva.com/security/advisories?name=MDVSA-2009:117
    http://www.securityfocus.com/archive/1/507985/100/0/threaded
    http://www.securityfocus.com/bid/35017
    http://www.securitytracker.com/id?1022243
    http://www.vmware.com/security/advisories/VMSA-2009-0016.html
    http://www.vupen.com/english/advisories/2009/1361
    http://www.vupen.com/english/advisories/2009/3316
    https://bugzilla.redhat.com/show_bug.cgi?id=499694
    https://launchpad.net/bugs/cve/2009-1252
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11231
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6307
    https://support.ntp.org/bugs/show_bug.cgi?id=1151
    https://usn.ubuntu.com/777-1/
    https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00293.html
    https://www.redhat.com/archives/fedora-package-announce/2009-May/msg01414.html
    https://www.redhat.com/archives/fedora-package-announce/2009-May/msg01449.html
    ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2009-006.txt.asc
    http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00003.html
    http://rhn.redhat.com/errata/RHSA-2009-1039.html
    http://rhn.redhat.com/errata/RHSA-2009-1040.html
    http://secunia.com/advisories/35137
    http://secunia.com/advisories/35138
    http://secunia.com/advisories/35166
    http://secunia.com/advisories/35169
    http://secunia.com/advisories/35243
    http://secunia.com/advisories/35253
    http://secunia.com/advisories/35308
    http://secunia.com/advisories/35336
    http://secunia.com/advisories/35388
    http://secunia.com/advisories/35416
    http://secunia.com/advisories/35630
    http://secunia.com/advisories/37470
    http://secunia.com/advisories/37471
    http://security.freebsd.org/advisories/FreeBSD-SA-09:11.ntpd.asc
    http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.566238
    http://wiki.rpath.com/wiki/Advisories:rPSA-2009-0092
    http://www.debian.org/security/2009/dsa-1801
    http://www.gentoo.org/security/en/glsa/glsa-200905-08.xml
    http://www.kb.cert.org/vuls/id/853097
    http://www.mandriva.com/security/advisories?name=MDVSA-2009:117
    http://www.securityfocus.com/archive/1/507985/100/0/threaded
    http://www.securityfocus.com/bid/35017
    http://www.securitytracker.com/id?1022243
    http://www.vmware.com/security/advisories/VMSA-2009-0016.html
    http://www.vupen.com/english/advisories/2009/1361
    http://www.vupen.com/english/advisories/2009/3316
    https://bugzilla.redhat.com/show_bug.cgi?id=499694
    https://launchpad.net/bugs/cve/2009-1252
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11231
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6307
    https://support.ntp.org/bugs/show_bug.cgi?id=1151
    https://usn.ubuntu.com/777-1/
    https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00293.html
    https://www.redhat.com/archives/fedora-package-announce/2009-May/msg01414.html
    https://www.redhat.com/archives/fedora-package-announce/2009-May/msg01449.html

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High