{"id":"CVE-2012-6656","aliases":["BELL-CVE-2012-6656","DEBIAN-CVE-2012-6656","DLA-97-1","DSA-3142-1","EUVD-2012-6502","GHSA-g6fx-pmc7-2qhp","SUSE-RU-2015:0794-1","SUSE-SU-2015:0253-1","SUSE-SU-2015:0439-1","SUSE-SU-2015:0551-1","UBUNTU-CVE-2012-6656","USN-2432-1"],"status":"published","title":"iconvdata/ibm930.c in GNU C Library (aka glibc) before 2.16 allows context-dependent attackers to...","description":"iconvdata/ibm930.c in GNU C Library (aka glibc) before 2.16 allows context-dependent attackers to cause a denial of service (out-of-bounds read) via a multibyte character value of \"0xffff\" to the iconv function when converting IBM930 encoded data to UTF-8.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.03439,"percentile":0.89054,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2012-12-31T00:00:00Z","modified":"2026-10-23T17:47:47Z","fixes":[{"ecosystem":"Debian:12","package":"glibc","fixed_in":["2.17-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"glibc","fixed_in":["2.17-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"glibc","fixed_in":["2.17-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"glibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.17-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"glibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.17-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"glibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.17-1"}]}]},{"source":"osv","ecosystem":"Debian:6.0","package":"eglibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.11.3-4+deb6u2"}]}],"versions":["2.11.2-10","2.11.2-10+m68k.1","2.11.2-11","2.11.2-11+m68k.1","2.11.2-12","2.11.2-13","2.11.3-1","2.11.3-2","2.11.3-3","2.11.3-4"],"bundled":3},{"source":"osv","ecosystem":"Debian:7","package":"eglibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.13-38+deb7u7"}]}],"versions":["2.13-38","2.13-38+deb7u1","2.13-38+deb7u2","2.13-38+deb7u3","2.13-38+deb7u4","2.13-38+deb7u5","2.13-38+deb7u6"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"eglibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.19-0ubuntu6.4"}]}],"versions":["2.17-93ubuntu4","2.18-0ubuntu1","2.18-0ubuntu2","2.18-0ubuntu4","2.18-0ubuntu5","2.18-0ubuntu6","2.18-0ubuntu7","2.19-0ubuntu2","2.19-0ubuntu3","2.19-0ubuntu4","2.19-0ubuntu5","2.19-0ubuntu6","2.19-0ubuntu6.1","2.19-0ubuntu6.3"],"bundled":3}],"products":[{"vendor":"canonical","product":"ubuntu_linux"},{"vendor":"debian","product":"debian_linux"},{"vendor":"gnu","product":"glibc"}],"references":[{"url":"http://www.securityfocus.com/bid/69472","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"http://www.ubuntu.com/usn/USN-2432-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred","Third Party Advisory","advisory"]},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2014:175","tags":["vendor-advisory","x_refsource_MANDRIVA","x_transferred","Broken Link","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2014/08/29/3","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory","article","report"]},{"url":"https://security.gentoo.org/glsa/201503-04","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","advisory"]},{"url":"https://sourceware.org/bugzilla/show_bug.cgi?id=14134","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Issue Tracking","evidence","report"]},{"url":"http://www.openwall.com/lists/oss-security/2014/09/02/1","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory","article"]},{"url":"https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=6e230d11837f3ae7b375ea69d7905f0d18eb79e5","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://www.debian.org/security/2015/dsa-3142","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2012-6656"},{"url":"https://sourceware.org/git/?p=glibc.git;a=commit;h=6e230d11837f3ae7b375ea69d7905f0d18eb79e5"},{"url":"https://github.com/advisories/GHSA-g6fx-pmc7-2qhp"},{"url":"https://docs.bell-sw.com/security/cves/CVE-2012-6656","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2012-6656","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement//suse-ru-20150794-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/691365","tags":["report"]},{"url":"https://bugzilla.suse.com/779320","tags":["report"]},{"url":"https://bugzilla.suse.com/791928","tags":["report"]},{"url":"https://bugzilla.suse.com/801246","tags":["report"]},{"url":"https://bugzilla.suse.com/811979","tags":["report"]},{"url":"https://bugzilla.suse.com/813121","tags":["report"]},{"url":"https://bugzilla.suse.com/819347","tags":["report"]},{"url":"https://bugzilla.suse.com/822210","tags":["report"]},{"url":"https://bugzilla.suse.com/827811","tags":["report"]},{"url":"https://bugzilla.suse.com/828235","tags":["report"]},{"url":"https://bugzilla.suse.com/828637","tags":["report"]},{"url":"https://bugzilla.suse.com/830268","tags":["report"]},{"url":"https://bugzilla.suse.com/834594","tags":["report"]},{"url":"https://bugzilla.suse.com/836746","tags":["report"]},{"url":"https://bugzilla.suse.com/839870","tags":["report"]},{"url":"https://bugzilla.suse.com/844309","tags":["report"]},{"url":"https://bugzilla.suse.com/847227","tags":["report"]},{"url":"https://bugzilla.suse.com/854445","tags":["report"]},{"url":"https://bugzilla.suse.com/863499","tags":["report"]},{"url":"https://bugzilla.suse.com/864081","tags":["report"]},{"url":"https://bugzilla.suse.com/872832","tags":["report"]},{"url":"https://bugzilla.suse.com/882028","tags":["report"]},{"url":"https://bugzilla.suse.com/882600","tags":["report"]},{"url":"https://bugzilla.suse.com/883217","tags":["report"]},{"url":"https://bugzilla.suse.com/886416","tags":["report"]},{"url":"https://bugzilla.suse.com/887022","tags":["report"]},{"url":"https://bugzilla.suse.com/888347","tags":["report"]},{"url":"https://bugzilla.suse.com/891843","tags":["report"]},{"url":"https://bugzilla.suse.com/892065","tags":["report"]},{"url":"https://bugzilla.suse.com/892073","tags":["report"]},{"url":"https://bugzilla.suse.com/894553","tags":["report"]},{"url":"https://bugzilla.suse.com/894556","tags":["report"]},{"url":"https://bugzilla.suse.com/903288","tags":["report"]},{"url":"https://bugzilla.suse.com/904461","tags":["report"]},{"url":"https://bugzilla.suse.com/906371","tags":["report"]},{"url":"https://bugzilla.suse.com/909053","tags":["report"]},{"url":"https://bugzilla.suse.com/913646","tags":["report"]},{"url":"https://bugzilla.suse.com/915526","tags":["report"]},{"url":"https://bugzilla.suse.com/916222","tags":["report"]},{"url":"https://bugzilla.suse.com/917072","tags":["report"]},{"url":"https://bugzilla.suse.com/919678","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2012-4412","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-6656","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-0242","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-1914","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4237","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4332","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4357","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4458","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4788","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-7423","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-0475","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-4043","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-5119","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-6040","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-7817","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-9402","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-0235","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-1472","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2015/suse-su-20150253-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2015/suse-su-20150439-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2015/suse-su-20150551-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/684534","tags":["report"]},{"url":"https://bugzilla.suse.com/741345","tags":["report"]},{"url":"https://bugzilla.suse.com/743689","tags":["report"]},{"url":"https://bugzilla.suse.com/744996","tags":["report"]},{"url":"https://bugzilla.suse.com/745658","tags":["report"]},{"url":"https://bugzilla.suse.com/746824","tags":["report"]},{"url":"https://bugzilla.suse.com/747768","tags":["report"]},{"url":"https://bugzilla.suse.com/750741","tags":["report"]},{"url":"https://bugzilla.suse.com/760795","tags":["report"]},{"url":"https://bugzilla.suse.com/763512","tags":["report"]},{"url":"https://bugzilla.suse.com/767266","tags":["report"]},{"url":"https://bugzilla.suse.com/770891","tags":["report"]},{"url":"https://bugzilla.suse.com/775690","tags":["report"]},{"url":"https://bugzilla.suse.com/777233","tags":["report"]},{"url":"https://bugzilla.suse.com/783060","tags":["report"]},{"url":"https://bugzilla.suse.com/785041","tags":["report"]},{"url":"https://bugzilla.suse.com/793146","tags":["report"]},{"url":"https://bugzilla.suse.com/795129","tags":["report"]},{"url":"https://bugzilla.suse.com/818628","tags":["report"]},{"url":"https://bugzilla.suse.com/910599","tags":["report"]},{"url":"https://bugzilla.suse.com/918233","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2012-0864","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-3404","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-3405","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-3406","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-3480","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2012-6656","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-2432-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2012-6656","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2014-6040","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2014-7817","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2012-6656","description":"iconvdata/ibm930.c in GNU C Library (aka glibc) before 2.16 allows context-dependent attackers to cause a denial of service (out-of-bounds read) via a multibyte character value of \"0xffff\" to the iconv function when converting IBM930 encoded data to UTF-8.","status":"published","published":"2014-12-05T16:00:00Z","modified":"2024-08-06T21:36:01.966Z","updated_at":"2026-11-02T14:34:51.269982Z"}],"euvd":[{"id":"EUVD-2012-6502","description":"iconvdata/ibm930.c in GNU C Library (aka glibc) before 2.16 allows context-dependent attackers to cause a denial of service (out-of-bounds read) via a multibyte character value of \"0xffff\" to the iconv function when converting IBM930 encoded data to UTF-8.","status":"published","published":"2014-12-05T16:00:00Z","modified":"2024-08-06T21:36:01Z","updated_at":"2026-11-03T01:56:01.964017Z"}],"ghsa":[{"id":"GHSA-g6fx-pmc7-2qhp","title":"iconvdata/ibm930.c in GNU C Library (aka glibc) before 2.16 allows context-dependent attackers to...","description":"iconvdata/ibm930.c in GNU C Library (aka glibc) before 2.16 allows context-dependent attackers to cause a denial of service (out-of-bounds read) via a multibyte character value of \"0xffff\" to the iconv function when converting IBM930 encoded data to UTF-8.","status":"published","published":"2022-05-17T02:39:19Z","modified":"2025-04-12T12:42:34Z","cwes":["CWE-20"],"updated_at":"2026-11-02T15:01:19.407948Z"}],"nvd":[{"id":"CVE-2012-6656","description":"iconvdata/ibm930.c in GNU C Library (aka glibc) before 2.16 allows context-dependent attackers to cause a denial of service (out-of-bounds read) via a multibyte character value of \"0xffff\" to the iconv function when converting IBM930 encoded data to UTF-8.","status":"published","published":"2014-12-05T16:59:00.067Z","modified":"2026-06-16T23:48:33.827Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:02:17.748457Z"}],"osv":[{"id":"BELL-CVE-2012-6656","title":"CVE-2012-6656 does not affect BellSoft software","status":"withdrawn","published":"2014-12-05T16:59:00Z","modified":"2026-01-28T07:19:50.76175Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium"}],"updated_at":"2026-11-02T15:28:13.47097Z"},{"id":"CVE-2012-6656","description":"iconvdata/ibm930.c in GNU C Library (aka glibc) before 2.16 allows context-dependent attackers to cause a denial of service (out-of-bounds read) via a multibyte character value of \"0xffff\" to the iconv function when converting IBM930 encoded data to UTF-8.","status":"published","published":"2014-12-05T16:59:00Z","modified":"2026-04-10T03:43:15.160647Z","updated_at":"2026-11-02T15:43:58.802805Z"},{"id":"DEBIAN-CVE-2012-6656","description":"iconvdata/ibm930.c in GNU C Library (aka glibc) before 2.16 allows context-dependent attackers to cause a denial of service (out-of-bounds read) via a multibyte character value of \"0xffff\" to the iconv function when converting IBM930 encoded data to UTF-8.","status":"published","published":"2014-12-05T16:59:00.067Z","modified":"2026-10-23T17:47:47.843075143Z","updated_at":"2026-11-02T15:45:25.218101Z"},{"id":"DLA-97-1","title":"eglibc - security update","status":"published","published":"2014-11-29T00:00:00Z","modified":"2026-03-09T01:01:19.85043Z","updated_at":"2026-11-02T15:46:13.584509Z"},{"id":"DSA-3142-1","title":"eglibc - security update","status":"published","published":"2015-01-27T00:00:00Z","modified":"2026-03-09T01:20:44.050715Z","updated_at":"2026-11-02T15:46:15.843838Z"},{"id":"SUSE-RU-2015:0794-1","title":"Security update for glibc","description":"\nThis glibc update fixes a critical privilege escalation problem and two \nnon-security issues:\n\n    * bnc#892073: An off-by-one error leading to a heap-based buffer\n      overflow was found in __gconv_translit_find(). An exploit that\n      targets the problem is publicly available. (CVE-2014-5119)\n    * bnc#892065: setenv-alloca.patch: Avoid unbound alloca in setenv.\n    * bnc#888347: printf-multibyte-format.patch: Don't parse %s format\n      argument as multi-byte string.\n\nSecurity Issues:\n\n    * CVE-2014-5119\n      \u003chttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-5119\u003e\n\n","status":"published","published":"2014-08-29T01:15:58Z","modified":"2026-02-04T04:36:32.287726Z","updated_at":"2026-11-02T15:53:41.276824Z"},{"id":"SUSE-SU-2015:0253-1","title":"Security update for glibc","description":"\nThis glibc update fixes a critical privilege escalation problem and two \nnon-security issues:\n\n    * bnc#892073: An off-by-one error leading to a heap-based buffer\n      overflow was found in __gconv_translit_find(). An exploit that\n      targets the problem is publicly available. (CVE-2014-5119)\n    * bnc#892065: setenv-alloca.patch: Avoid unbound alloca in setenv.\n    * bnc#888347: printf-multibyte-format.patch: Don't parse %s format\n      argument as multi-byte string.\n\nSecurity Issues:\n\n    * CVE-2014-5119\n      \u003chttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-5119\u003e\n\n","status":"published","published":"2014-08-29T01:15:58Z","modified":"2026-02-04T02:39:46.246573Z","updated_at":"2026-11-02T15:53:41.276824Z"},{"id":"SUSE-SU-2015:0439-1","title":"Security update for glibc","description":"\nThis glibc update fixes a critical privilege escalation problem and two \nnon-security issues:\n\n    * bnc#892073: An off-by-one error leading to a heap-based buffer\n      overflow was found in __gconv_translit_find(). An exploit that\n      targets the problem is publicly available. (CVE-2014-5119)\n    * bnc#892065: setenv-alloca.patch: Avoid unbound alloca in setenv.\n    * bnc#888347: printf-multibyte-format.patch: Don't parse %s format\n      argument as multi-byte string.\n\nSecurity Issues:\n\n    * CVE-2014-5119\n      \u003chttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-5119\u003e\n\n","status":"published","published":"2014-08-29T01:15:58Z","modified":"2026-02-04T03:13:26.319151Z","updated_at":"2026-11-02T15:53:41.276824Z"},{"id":"SUSE-SU-2015:0551-1","title":"Security update for glibc","description":"\nThis update for glibc contains the following fixes:\n\n    * Fix integer overflows in malloc (CVE-2013-4332, bnc#839870)\n    * Fix buffer overflow in glob (bnc#691365)\n    * Fix buffer overflow in strcoll (CVE-2012-4412, bnc#779320)\n    * Update mount flags in \u003csys/mount.h\u003e (bnc#791928)\n    * Fix buffer overrun in regexp matcher (CVE-2013-0242, bnc#801246)\n    * Fix memory leaks in dlopen (bnc#811979)\n    * Fix stack overflow in getaddrinfo with many results (CVE-2013-1914,\n      bnc#813121)\n    * Fix check for XEN build in glibc_post_upgrade that causes missing\n      init re-exec (bnc#818628)\n    * Don't raise UNDERFLOW in tan/tanf for small but normal argument\n      (bnc#819347)\n    * Properly cross page boundary in SSE4.2 implementation of strcmp\n      (bnc#822210)\n    * Fix robust mutex handling after fork (bnc#827811)\n    * Fix missing character in IBM-943 charset (bnc#828235)\n    * Fix use of alloca in gaih_inet (bnc#828637)\n    * Initialize pointer guard also in static executables (CVE-2013-4788,\n      bnc#830268)\n    * Fix readdir_r with long file names (CVE-2013-4237, bnc#834594).\n\nSecurity Issues:\n\n    * CVE-2012-4412\n      \u003chttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-4412\u003e\n    * CVE-2013-0242\n      \u003chttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0242\u003e\n    * CVE-2013-1914\n      \u003chttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-1914\u003e\n    * CVE-2013-4237\n      \u003chttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4237\u003e\n    * CVE-2013-4332\n      \u003chttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4332\u003e\n    * CVE-2013-4788\n      \u003chttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4788\u003e\n\n","status":"published","published":"2013-09-13T15:23:14Z","modified":"2026-02-04T03:53:46.201019Z","updated_at":"2026-11-02T15:53:41.276824Z"},{"id":"UBUNTU-CVE-2012-6656","description":"iconvdata/ibm930.c in GNU C Library (aka glibc) before 2.16 allows context-dependent attackers to cause a denial of service (out-of-bounds read) via a multibyte character value of \"0xffff\" to the iconv function when converting IBM930 encoded data to UTF-8.","status":"withdrawn","published":"2012-12-31T00:00:00Z","modified":"2026-02-04T04:28:24.839408Z","updated_at":"2026-11-02T15:54:06.854805Z"},{"id":"USN-2432-1","title":"eglibc, glibc vulnerabilities","description":"Siddhesh Poyarekar discovered that the GNU C Library incorrectly handled\ncertain multibyte characters when using the iconv function. An attacker\ncould possibly use this issue to cause applications to crash, resulting in\na denial of service. This issue only affected Ubuntu 10.04 LTS and Ubuntu\n12.04 LTS. (CVE-2012-6656)\n\nAdhemerval Zanella Netto discovered that the GNU C Library incorrectly\nhandled certain multibyte characters when using the iconv function. An\nattacker could possibly use this issue to cause applications to crash,\nresulting in a denial of service. (CVE-2014-6040)\n\nTim Waugh discovered that the GNU C Library incorrectly enforced the\nWRDE_NOCMD flag when handling the wordexp function. An attacker could\npossibly use this issue to execute arbitrary commands. (CVE-2014-7817)\n","status":"published","published":"2014-12-03T18:26:07Z","modified":"2026-04-22T09:03:52.882688Z","updated_at":"2026-11-02T16:58:09.227524Z"}]}}