{"id":"UBUNTU-CVE-2020-37121","details":"CODE::BLOCKS 16.01 contains a buffer overflow vulnerability that allows attackers to execute arbitrary code by overwriting Structured Exception Handler with crafted Unicode characters. Attackers can create a malicious text file with 1982 bytes of buffer and shellcode to trigger remote code execution.","modified":"2026-09-16T14:00:54.815701828Z","published":"2026-02-05T17:16:00Z","upstream":["CVE-2020-37121"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-37121"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-37121"},{"type":"REPORT","url":"https://www.exploit-db.com/exploits/48344"},{"type":"REPORT","url":"https://sourceforge.net/projects/codeblocks/"},{"type":"REPORT","url":"https://www.codeblocks.org/"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/codeblocks-buffer-overflow-seh-unicode"}],"affected":[{"package":{"name":"codeblocks","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/codeblocks?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["13.12-3.1build1","13.12+dfsg-4"],"ecosystem_specific":{"binaries":[{"binary_name":"codeblocks","binary_version":"13.12+dfsg-4"},{"binary_version":"13.12+dfsg-4","binary_name":"codeblocks-common"},{"binary_name":"codeblocks-contrib","binary_version":"13.12+dfsg-4"},{"binary_version":"13.12+dfsg-4","binary_name":"libcodeblocks0"},{"binary_name":"libwxsmithlib0","binary_version":"13.12+dfsg-4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-37121.json"}},{"package":{"name":"codeblocks","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/codeblocks?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["16.01+dfsg-2.1"],"ecosystem_specific":{"binaries":[{"binary_name":"codeblocks","binary_version":"16.01+dfsg-2.1"},{"binary_name":"codeblocks-common","binary_version":"16.01+dfsg-2.1"},{"binary_version":"16.01+dfsg-2.1","binary_name":"codeblocks-contrib"},{"binary_version":"16.01+dfsg-2.1","binary_name":"libcodeblocks0"},{"binary_name":"libwxsmithlib0","binary_version":"16.01+dfsg-2.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-37121.json"}},{"package":{"name":"codeblocks","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/codeblocks?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["16.01+dfsg-2.1","17.12+dfsg-1","17.12+dfsg-1build1","20.03-3"],"ecosystem_specific":{"binaries":[{"binary_name":"codeblocks","binary_version":"20.03-3"},{"binary_version":"20.03-3","binary_name":"codeblocks-common"},{"binary_name":"codeblocks-contrib","binary_version":"20.03-3"},{"binary_name":"libcodeblocks0","binary_version":"20.03-3"},{"binary_name":"libwxsmithlib0","binary_version":"20.03-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-37121.json"}},{"package":{"name":"codeblocks","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/codeblocks?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20.03-3","20.03-3.1"],"ecosystem_specific":{"binaries":[{"binary_name":"codeblocks","binary_version":"20.03-3.1"},{"binary_name":"codeblocks-common","binary_version":"20.03-3.1"},{"binary_version":"20.03-3.1","binary_name":"codeblocks-contrib"},{"binary_name":"libcodeblocks0","binary_version":"20.03-3.1"},{"binary_name":"libwxsmithlib0","binary_version":"20.03-3.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-37121.json"}},{"package":{"name":"codeblocks","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/codeblocks?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20.03+svn13046-0.1build1","20.03+svn13046-0.2","20.03+svn13046-0.3build1","20.03+svn13046-0.3build2"],"ecosystem_specific":{"binaries":[{"binary_version":"20.03+svn13046-0.3build2","binary_name":"codeblocks"},{"binary_name":"codeblocks-common","binary_version":"20.03+svn13046-0.3build2"},{"binary_version":"20.03+svn13046-0.3build2","binary_name":"codeblocks-contrib"},{"binary_name":"libcodeblocks0t64","binary_version":"20.03+svn13046-0.3build2"},{"binary_version":"20.03+svn13046-0.3build2","binary_name":"libwxsmithlib0t64"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-37121.json"}},{"package":{"name":"codeblocks","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/codeblocks?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20.03+svn13046-0.4","25.03+dfsg-2"],"ecosystem_specific":{"binaries":[{"binary_name":"codeblocks","binary_version":"25.03+dfsg-2"},{"binary_name":"codeblocks-common","binary_version":"25.03+dfsg-2"},{"binary_name":"codeblocks-contrib","binary_version":"25.03+dfsg-2"},{"binary_name":"libcodeblocks0t64","binary_version":"25.03+dfsg-2"},{"binary_version":"25.03+dfsg-2","binary_name":"libwxsmithlib0t64"}]},"database_specific":{"source":"http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