{"id":"UBUNTU-CVE-2021-36386","details":"report_vbuild in report.c in Fetchmail before 6.4.20 sometimes omits initialization of the vsnprintf va_list argument, which might allow mail servers to cause a denial of service or possibly have unspecified other impact via long error messages. NOTE: it is unclear whether use of Fetchmail on any realistic platform results in an impact beyond an inconvenience to the client user.","modified":"2025-10-24T04:50:26Z","published":"2021-07-30T14:15:00Z","upstream":["CVE-2021-36386"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-36386"},{"type":"REPORT","url":"https://www.fetchmail.info/fetchmail-SA-2021-01.txt"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-36386"}],"affected":[{"package":{"name":"fetchmail","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/fetchmail@6.3.26-2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.3.26-1","6.3.26-2"],"ecosystem_specific":{"binaries":[{"binary_name":"fetchmail","binary_version":"6.3.26-2"},{"binary_name":"fetchmailconf","binary_version":"6.3.26-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-36386.json"}},{"package":{"name":"fetchmail","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/fetchmail@6.3.26-3ubuntu0.1~18.04.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.3.26-3","6.3.26-3build1","6.3.26-3ubuntu0.1~18.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"fetchmail","binary_version":"6.3.26-3ubuntu0.1~18.04.1"},{"binary_version":"6.3.26-3ubuntu0.1~18.04.1","binary_name":"fetchmailconf"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-36386.json"}},{"package":{"name":"fetchmail","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/fetchmail@6.4.2-2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.4.0~rc4-1ubuntu1","6.4.1-1ubuntu1","6.4.2-2"],"ecosystem_specific":{"binaries":[{"binary_version":"6.4.2-2","binary_name":"fetchmail"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-36386.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}