{"id":"CVE-2012-4502","url":"https://www.cyber-defence.io/tools/cve/CVE-2012-4502","generatedAt":"2026-10-27T17:43:52.964Z","title":"Multiple integer overflows in pktlength.c in Chrony before 1.29 allow remote attackers to cause a denial of service (crash) via a crafted (1) REQ_SUBNETS_ACCESSED or (2) REQ_CLIENT_ACCESSES command request to the PKL_CommandLength function or crafted…","description":"Multiple integer overflows in pktlength.c in Chrony before 1.29 allow remote attackers to cause a denial of service (crash) via a crafted (1) REQ_SUBNETS_ACCESSED or (2) REQ_CLIENT_ACCESSES command request to the PKL_CommandLength function or crafted (3) RPY_SUBNETS_ACCESSED, (4) RPY_CLIENT_ACCESSES, (5) RPY_CLIENT_ACCESSES_BY_INDEX, or (6) RPY_MANUAL_LIST command reply to the PKL_ReplyLength function, which triggers an out-of-bounds read or buffer overflow.  NOTE: versions 1.27 and 1.28 do not require authentication to exploit.","published":"2013-11-05T21:55:08.000Z","lastModified":"2026-06-16T23:45:13.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":5,"severity":"MEDIUM","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P"},"cwe":["CWE-189"],"affected":["tuxfamily/chrony"],"epss":{"score":0.03244,"percentile":0.88219,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (3.24%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://git.tuxfamily.org/chrony/chrony.git/?p=chrony/chrony.git%3Ba=commitdiff%3Bh=7712455d9aa33d0db0945effaa07e900b85987b1","source":"secalert@redhat.com"},{"url":"http://permalink.gmane.org/gmane.comp.time.chrony.announce/15","tags":["Patch","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://seclists.org/oss-sec/2013/q3/332","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2013/dsa-2760","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=846392","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"http://git.tuxfamily.org/chrony/chrony.git/?p=chrony/chrony.git%3Ba=commitdiff%3Bh=7712455d9aa33d0db0945effaa07e900b85987b1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://permalink.gmane.org/gmane.comp.time.chrony.announce/15","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/oss-sec/2013/q3/332","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2013/dsa-2760","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=846392","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2012-4502","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}