USN-4993-1: Dovecot vulnerabilities<\/p>\n
Kirin discovered that Dovecot incorrectly escaped kid and azp fields in JWT
\ntokens. A local attacker could possibly use this issue to validate tokens
\nusing arbitrary keys. This issue only affected Ubuntu 20.10 and Ubuntu
\n21.04. (CVE-2021-29157)<\/p>\n
Fabian Ising and Damian Poddebniak discovered that Dovecot incorrectly USN-4993-1: Dovecot vulnerabilities Kirin discovered that Dovecot incorrectly escaped kid and azp fields in JWT tokens. A local attacker could possibly use this issue to validate tokens using arbitrary keys. This issue only affected Ubuntu 20.10 and Ubuntu 21.04. (CVE-2021-29157) Fabian Ising and Damian Poddebniak discovered that Dovecot incorrectly handled STARTTLS when using the SMTP submission service. A remote attacker could possibly use this issue to inject plaintext commands before STARTTLS negotiation. (CVE-2021-33515) Source: USN-4993-1: Dovecot vulnerabilities<\/p>\n<\/div>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[586],"tags":[587],"class_list":["post-42139","post","type-post","status-publish","format-standard","hentry","category-ubuntu-usn","tag-ubuntu-usn"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/42139","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/comments?post=42139"}],"version-history":[{"count":1,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/42139\/revisions"}],"predecessor-version":[{"id":42140,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/42139\/revisions\/42140"}],"wp:attachment":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/media?parent=42139"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/categories?post=42139"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/tags?post=42139"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nhandled STARTTLS when using the SMTP submission service. A remote attacker
\ncould possibly use this issue to inject plaintext commands before
\nSTARTTLS negotiation. (CVE-2021-33515)
\nSource: USN-4993-1: Dovecot vulnerabilities<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"