{"id":"CVE-2011-4603","url":"https://www.cyber-defence.io/tools/cve/CVE-2011-4603","generatedAt":"2026-10-27T18:46:31.434Z","title":"The silc_channel_message function in ops.c in the SILC protocol plugin in libpurple in Pidgin before 2.10.1 does not perform the expected UTF-8 validation on message data, which allows remote attackers to cause a denial of service (application crash)…","description":"The silc_channel_message function in ops.c in the SILC protocol plugin in libpurple in Pidgin before 2.10.1 does not perform the expected UTF-8 validation on message data, which allows remote attackers to cause a denial of service (application crash) via a crafted message, a different vulnerability than CVE-2011-3594.","published":"2011-12-17T03:54:46.000Z","lastModified":"2026-06-16T23:35:08.000Z","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-20"],"affected":["pidgin/pidgin"],"epss":{"score":0.036,"percentile":0.89379,"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 (3.60%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://developer.pidgin.im/viewmtn/revision/diff/c7b95cc3be0590b52edc02d4750ae62844c1acb6/with/afb9ede3de989f217f03d5670cca00e628bd11f1/libpurple/protocols/silc/ops.c","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"http://developer.pidgin.im/viewmtn/revision/info/afb9ede3de989f217f03d5670cca00e628bd11f1","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/47234","source":"secalert@redhat.com"},{"url":"http://www.pidgin.im/news/security/?id=59","tags":["Patch","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.redhat.com/support/errata/RHSA-2011-1820.html","source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/51074","source":"secalert@redhat.com"},{"url":"https://hermes.opensuse.org/messages/13195955","source":"secalert@redhat.com"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18303","source":"secalert@redhat.com"},{"url":"http://developer.pidgin.im/viewmtn/revision/diff/c7b95cc3be0590b52edc02d4750ae62844c1acb6/with/afb9ede3de989f217f03d5670cca00e628bd11f1/libpurple/protocols/silc/ops.c","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://developer.pidgin.im/viewmtn/revision/info/afb9ede3de989f217f03d5670cca00e628bd11f1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/47234","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.pidgin.im/news/security/?id=59","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.redhat.com/support/errata/RHSA-2011-1820.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/51074","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://hermes.opensuse.org/messages/13195955","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18303","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2011-4603","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."}