{"id":"CVE-2011-1487","url":"https://www.cyber-defence.io/tools/cve/CVE-2011-1487","generatedAt":"2026-10-27T19:49:29.107Z","title":"The (1) lc, (2) lcfirst, (3) uc, and (4) ucfirst functions in Perl 5.10.x, 5.11.x, and 5.12.x through 5.12.3, and 5.13.x through 5.13.11, do not apply the taint attribute to the return value upon processing tainted input, which might allow…","description":"The (1) lc, (2) lcfirst, (3) uc, and (4) ucfirst functions in Perl 5.10.x, 5.11.x, and 5.12.x through 5.12.3, and 5.13.x through 5.13.11, do not apply the taint attribute to the return value upon processing tainted input, which might allow context-dependent attackers to bypass the taint protection mechanism via a crafted string.","published":"2011-04-11T18:55:04.000Z","lastModified":"2026-06-16T23:29:29.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":5,"severity":"MEDIUM","vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N"},"cwe":["CWE-264"],"affected":["perl/perl"],"epss":{"score":0.1058,"percentile":0.9575,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2011-03-30","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":35554,"kind":"exploit","title":"Perl 5.x - 'lc()' / 'uc()' TAINT Mode Protection Security Bypass","url":"https://www.exploit-db.com/exploits/35554","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/remote/35554.txt","file":"exploits/linux/remote/35554.txt","published":"2011-03-30","added":"2011-03-30","updated":"2014-12-16","author":"mmartinec","type":"remote","platform":"linux","port":null,"verified":true,"codes":["CVE-2011-1487","OSVDB-75047"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://www.securityfocus.com/bid/47124/info"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 10.6%, higher than 96% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2011-April/057891.html","source":"secalert@redhat.com"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2011-April/057971.html","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html","source":"secalert@redhat.com"},{"url":"http://openwall.com/lists/oss-security/2011/04/01/3","tags":["Exploit","Patch"],"source":"secalert@redhat.com"},{"url":"http://openwall.com/lists/oss-security/2011/04/04/35","tags":["Exploit","Patch"],"source":"secalert@redhat.com"},{"url":"http://perl5.git.perl.org/perl.git/commit/539689e74a3bcb04d29e4cd9396de91a81045b99","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"http://rt.perl.org/rt3/Public/Bug/Display.html?id=87336","tags":["Exploit"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/43921","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/44168","source":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2011/dsa-2265","source":"secalert@redhat.com"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2011:091","source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/47124","tags":["Exploit"],"source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=692844","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=692898","tags":["Exploit","Patch"],"source":"secalert@redhat.com"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/66528","source":"secalert@redhat.com"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2011-April/057891.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2011-April/057971.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://openwall.com/lists/oss-security/2011/04/01/3","tags":["Exploit","Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://openwall.com/lists/oss-security/2011/04/04/35","tags":["Exploit","Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://perl5.git.perl.org/perl.git/commit/539689e74a3bcb04d29e4cd9396de91a81045b99","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rt.perl.org/rt3/Public/Bug/Display.html?id=87336","tags":["Exploit"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/43921","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/44168","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2011/dsa-2265","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2011:091","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/47124","tags":["Exploit"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=692844","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=692898","tags":["Exploit","Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/66528","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2011-1487","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."}