{"id":12224,"date":"2016-11-29T05:34:34","date_gmt":"2016-11-28T20:34:34","guid":{"rendered":"https:\/\/jirak.net\/wp\/usn-3138-1-python-cryptography-vulnerability\/"},"modified":"2016-11-29T05:34:34","modified_gmt":"2016-11-28T20:34:34","slug":"usn-3138-1-python-cryptography-vulnerability","status":"publish","type":"post","link":"https:\/\/jirak.net\/wp\/usn-3138-1-python-cryptography-vulnerability\/","title":{"rendered":"USN-3138-1: python-cryptography vulnerability"},"content":{"rendered":"<p>USN-3138-1: python-cryptography vulnerability<\/p>\n<h2>Ubuntu Security Notice USN-3138-1<\/h2>\n<p><em>28th November, 2016<\/em><\/p>\n<h3>python-cryptography vulnerability<\/h3>\n<p>A security issue affects these releases of Ubuntu and its<br \/>\n    derivatives:<\/p>\n<ul>\n<li>Ubuntu 16.10<\/li>\n<li>Ubuntu 16.04 LTS<\/li>\n<\/ul>\n<h3>Summary<\/h3>\n<p>python-cryptography could generate incorrect keys.\n<\/p>\n<h3>Software description<\/h3>\n<ul>\n<li>python-cryptography<br \/>\n    &#8211; Cryptography Python library<\/p>\n<\/li>\n<\/ul>\n<h3>Details<\/h3>\n<p>Markus D\u00f6ring discovered that python-cryptography incorrectly handled<br \/>certain HKDF lengths. This could result in python-cryptography returning an<br \/>empty string instead of the expected derived key.<\/p>\n<h3>Update instructions<\/h3>\n<p> The problem can be corrected by updating your system to the following<br \/>\npackage version:<\/p>\n<dl>\n<dt>Ubuntu 16.10:<\/dt>\n<dd>\n    <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/python-cryptography\">python3-cryptography<\/a><br \/>\n    <span><br \/>\n        <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/python-cryptography\/1.5-2ubuntu0.1\">1.5-2ubuntu0.1<\/a><br \/>\n    <\/span>\n  <\/dd>\n<dd>\n    <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/python-cryptography\">python-cryptography<\/a><br \/>\n    <span><br \/>\n        <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/python-cryptography\/1.5-2ubuntu0.1\">1.5-2ubuntu0.1<\/a><br \/>\n    <\/span>\n  <\/dd>\n<dt>Ubuntu 16.04 LTS:<\/dt>\n<dd>\n    <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/python-cryptography\">python3-cryptography<\/a><br \/>\n    <span><br \/>\n        <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/python-cryptography\/1.2.3-1ubuntu0.1\">1.2.3-1ubuntu0.1<\/a><br \/>\n    <\/span>\n  <\/dd>\n<dd>\n    <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/python-cryptography\">python-cryptography<\/a><br \/>\n    <span><br \/>\n        <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/python-cryptography\/1.2.3-1ubuntu0.1\">1.2.3-1ubuntu0.1<\/a><br \/>\n    <\/span>\n  <\/dd>\n<\/dl>\n<p>To update your system, please follow these instructions:<br \/>\n<a href=\"https:\/\/wiki.ubuntu.com\/Security\/Upgrades\">https:\/\/wiki.ubuntu.com\/Security\/Upgrades<\/a>.\n<\/p>\n<p>In general, a standard system update will make all the necessary changes.<\/p>\n<h3>References<\/h3>\n<p>        <a href=\"http:\/\/people.ubuntu.com\/~ubuntu-security\/cve\/CVE-2016-9243\">CVE-2016-9243<\/a><\/p>\n<p>Source: <a href=\"http:\/\/www.ubuntu.com\/usn\/usn-3138-1\/\" target=\"_blank\">USN-3138-1: python-cryptography vulnerability<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<div class=\"mh-excerpt\"><p>USN-3138-1: python-cryptography vulnerability Ubuntu Security Notice USN-3138-1 28th November, 2016 python-cryptography vulnerability A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 16.10 Ubuntu 16.04 LTS Summary python-cryptography could generate incorrect keys. Software description python-cryptography &#8211; Cryptography Python library Details Markus D\u00f6ring discovered that python-cryptography incorrectly handledcertain HKDF lengths. This could result in python-cryptography returning anempty string instead of the expected derived key. Update instructions The problem can be corrected by updating your system to the following package version: Ubuntu 16.10: python3-cryptography 1.5-2ubuntu0.1 python-cryptography 1.5-2ubuntu0.1 Ubuntu 16.04 LTS: python3-cryptography 1.2.3-1ubuntu0.1 python-cryptography 1.2.3-1ubuntu0.1 To update your system, please follow these instructions: https:\/\/wiki.ubuntu.com\/Security\/Upgrades. In general, a standard system update will make all the necessary changes. References CVE-2016-9243 Source: USN-3138-1: python-cryptography vulnerability<\/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-12224","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\/12224","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=12224"}],"version-history":[{"count":1,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/12224\/revisions"}],"predecessor-version":[{"id":12225,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/12224\/revisions\/12225"}],"wp:attachment":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/media?parent=12224"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/categories?post=12224"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/tags?post=12224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}