==================================================================== CERT-Renater Note d'Information No. 2020/VULN516 _____________________________________________________________________ DATE : 16/09/2020 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Systems running Android Lint Plugin for Jenkins, Blue Ocean Plugin for Jenkins, chosen-views-tabbar Plugin for Jenkins, ClearCase Release Plugin for Jenkins, computer-queue-plugin Plugin for Jenkins, Copy data to workspace Plugin for Jenkins, Coverage/Complexity Scatter Plot Plugin for Jenkins, Custom Job Icon Plugin for Jenkins, Description Column Plugin for Jenkins, ElasTest Plugin for Jenkins, Email Extension Plugin for Jenkins, Health Advisor by CloudBees Plugin for Jenkins, Locked Files Report Plugin for Jenkins, Mailer Plugin for Jenkins, MongoDB Plugin for Jenkins, Perfecto Plugin for Jenkins, Pipeline Maven Integration Plugin for Jenkins, Radiator View Plugin for Jenkins, Selection tasks Plugin for Jenkins, Storable Configs Plugin for Jenkins, Validating String Parameter Plugin for Jenkins. ===================================================================== https://www.jenkins.io/security/advisory/2020-09-16/ _____________________________________________________________________ Jenkins Security Advisory 2020-09-16 This advisory announces vulnerabilities in the following Jenkins deliverables: Android Lint Plugin Blue Ocean Plugin chosen-views-tabbar Plugin ClearCase Release Plugin computer-queue-plugin Plugin Copy data to workspace Plugin Coverage/Complexity Scatter Plot Plugin Custom Job Icon Plugin Description Column Plugin ElasTest Plugin Email Extension Plugin Health Advisor by CloudBees Plugin Locked Files Report Plugin Mailer Plugin MongoDB Plugin Perfecto Plugin Pipeline Maven Integration Plugin Radiator View Plugin Selection tasks Plugin Storable Configs Plugin Validating String Parameter Plugin Descriptions Missing hostname validation in Mailer Plugin SECURITY-1813 / CVE-2020-2252 Mailer Plugin 1.32 and earlier does not perform hostname validation when connecting to the configured SMTP server. This lack of validation could be abused using a man-in-the-middle attack to intercept these connections. Mailer Plugin 1.32.1 validates the SMTP hostname when connecting via TLS by default. In Mailer Plugin 1.32 and earlier, administrators can set the Java system property mail.smtp.ssl.checkserveridentity to true on startup to enable this protection. In case of problems, this protection can be disabled again by setting the Java system property mail.smtp.ssl.checkserveridentity to false on startup. Missing hostname validation in Email Extension Plugin SECURITY-1851 / CVE-2020-2253 Email Extension Plugin 2.75 and earlier does not perform hostname validation when connecting to the configured SMTP server. This lack of validation could be abused using a man-in-the-middle attack to intercept these connections. Email Extension Plugin 2.76 validates the SMTP hostname when connecting via TLS by default. In Email Extension Plugin 2.75 and earlier, administrators can set the Java system property mail.smtp.ssl.checkserveridentity to true on startup to enable this protection. Alternatively, this protection can be enabled (or disabled in the new version) via the 'Advanced Email Properties' field in the plugin’s configuration in Configure System. In case of problems, this protection can be disabled again by setting mail.smtp.ssl.checkserveridentity to false using either method. Path traversal vulnerability in Blue Ocean Plugin SECURITY-1956 / CVE-2020-2254 Blue Ocean Plugin 1.23.2 and earlier provides an undocumented feature flag, blueocean.features.GIT_READ_SAVE_TYPE, that when set to the value clone allows an attacker with Item/Configure or Item/Create permission to read arbitrary files on the Jenkins controller file system. Blue Ocean Plugin 1.23.3 no longer includes this feature and redirects existing usage to a safer alternative. SSRF vulnerability in Blue Ocean Plugin SECURITY-1961 / CVE-2020-2255 A missing permission check in a REST API in Blue Ocean Plugin 1.23.2 and earlier allows attackers with Overall/Read permission to initiate a connection test to an attacker-specified URL. Blue Ocean Plugin 1.23.3 requires Item/Create permissions to create GitHub server and BitBucket server connections. Stored XSS vulnerability in upstream cause in Pipeline Maven Integration Plugin SECURITY-1976 / CVE-2020-2256 Pipeline Maven Integration Plugin 3.9.2 and earlier does not escape the upstream job’s display name shown as part of a build cause. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission. Pipeline Maven Integration Plugin 3.9.3 escapes upstream job names in build causes. Stored XSS vulnerability in Validating String Parameter Plugin SECURITY-1935 / CVE-2020-2257 Validating String Parameter Plugin 2.4 and earlier does not escape regular expressions in tooltips. Additionally, Validating String Parameter Plugin 2.4 does not escape parameter names and parameter descriptions. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission. Validating String Parameter Plugin 2.5 escapes regular expressions in tooltips and parameter names. Parameter descriptions are rendered using the configured markup formatter. Incorrect permission check in Health Advisor by CloudBees Plugin SECURITY-1998 / CVE-2020-2258 Health Advisor by CloudBees Plugin 3.2.0 and earlier does not correctly perform a permission check in an HTTP endpoint. This allows attackers with Overall/Read permission to view an administrative configuration page. Health Advisor by CloudBees Plugin 3.2.1 requires Overall/Administer to view its administrative configuration page. Stored XSS vulnerability in computer-queue-plugin Plugin SECURITY-1912 / CVE-2020-2259 computer-queue-plugin Plugin 1.5 and earlier does not escape the agent name in tooltips. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Agent/Configure permission. computer-queue-plugin Plugin 1.6 escapes the agent name in tooltips. Missing permission check in Perfecto Plugin SECURITY-1979 / CVE-2020-2260 Perfecto Plugin 1.17 and earlier does not perform a permission check in a method implementing a connection test. This allows attackers with Overall/Read permission to connect to an attacker-specified HTTP URL using attacker-specified username and password. Perfecto Plugin 1.18 requires Overall/Administer permission to perform a connection test. OS command execution vulnerability in Perfecto Plugin SECURITY-1980 / CVE-2020-2261 Perfecto Plugin allows specifying Perfecto Connect Path and Perfecto Connect File Name in job configurations. This command is executed on the Jenkins controller in Perfecto Plugin 1.17 and earlier, allowing attackers with Job/Configure permission to run arbitrary commands on the Jenkins controller. Perfecto Plugin 1.18 executes the specified commands on the agent the build is running on. Stored XSS vulnerability in Android Lint Plugin SECURITY-1908 / CVE-2020-2262 Android Lint Plugin 2.6 and earlier does not escape the annotation message in tooltips. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to provide report files to the 'Publish Android Lint results' post-build step. As of publication of this advisory, there is no fix. Stored XSS vulnerability in Radiator View Plugin SECURITY-1927 / CVE-2020-2263 Radiator View Plugin 1.29 and earlier does not escape the full name of the jobs in tooltips. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission. As of publication of this advisory, there is no fix. Stored XSS vulnerability in Custom Job Icon Plugin SECURITY-1914 / CVE-2020-2264 Custom Job Icon Plugin 0.2 and earlier does not escape the job descriptions in tooltips. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission. As of publication of this advisory, there is no fix. Stored XSS vulnerability in Coverage/Complexity Scatter Plot Plugin SECURITY-1913 / CVE-2020-2265 Coverage/Complexity Scatter Plot Plugin 1.1.1 and earlier does not escape the method information in tooltips. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to provide report files to the 'Publish Coverage / Complexity Scatter Plot' post-build step. As of publication of this advisory, there is no fix. Stored XSS vulnerability in Description Column Plugin SECURITY-1916 / CVE-2020-2266 Description Column Plugin 1.3 and earlier does not escape the job description in the column tooltips. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission. As of publication of this advisory, there is no fix. CSRF vulnerability and missing permission checks in MongoDB Plugin SECURITY-1904 / CVE-2020-2267 (missing permission check), CVE-2020-2268 (CSRF) MongoDB Plugin 1.3 and earlier does not perform permission checks in methods implementing form validation. This allows attackers with Overall/Read permission to gain access to some metadata of any arbitrary files on the Jenkins controller. Additionally, these form validation methods do not require POST requests, resulting in a cross-site request forgery (CSRF) vulnerability. As of publication of this advisory, there is no fix. Stored XSS vulnerability in chosen-views-tabbar Plugin SECURITY-1869 / CVE-2020-2269 chosen-views-tabbar Plugin 1.2 and earlier does not escape view names in the dropdown to select views. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with the ability to configure views. As of publication of this advisory, there is no fix. Stored XSS vulnerability in ClearCase Release Plugin SECURITY-1911 / CVE-2020-2270 ClearCase Release Plugin 0.3 and earlier does not escape the composite baseline in badge tooltip. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission. As of publication of this advisory, there is no fix. Stored XSS vulnerability in Locked Files Report Plugin SECURITY-1921 / CVE-2020-2271 Locked Files Report Plugin 1.6 and earlier does not escape locked files' names in tooltips. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission. As of publication of this advisory, there is no fix. CSRF vulnerability and missing permission checks in ElasTest Plugin SECURITY-1903 / CVE-2020-2272 (missing permission check), CVE-2020-2273 (CSRF) ElasTest Plugin 1.2.1 and earlier does not perform a permission check in a method implementing form validation. This allows attackers with Overall/Read permission to connect to an attacker-specified URL using attacker-specified credentials. Additionally, this form validation method does not require POST requests, resulting in a cross-site request forgery (CSRF) vulnerability. As of publication of this advisory, there is no fix. Passwords stored in plain text by ElasTest Plugin SECURITY-2014 / CVE-2020-2274 ElasTest Plugin 1.2.1 and earlier stores its server password in plain text in the global configuration file jenkins.plugins.elastest.ElasTestInstallation.xml. This password can be viewed by users with access to the Jenkins controller file system. As of publication of this advisory, there is no fix. Arbitrary file read vulnerability in Copy data to workspace Plugin SECURITY-1966 / CVE-2020-2275 Copy data to workspace Plugin allows users to copy files from the Jenkins controller to job workspaces. Copy data to workspace Plugin 1.0 and earlier does not limit which directories can be copied. This allows attackers with Job/Configure permission to read arbitrary files on the Jenkins controller. As of publication of this advisory, there is no fix. System command execution vulnerability in Selection tasks Plugin SECURITY-1967 / CVE-2020-2276 Selection tasks Plugin implements a job parameter that dynamically generates possible values from the output of a program. The path to that program is specified as part of the parameter configuration. Selection tasks Plugin 1.0 and earlier executes this user-specified program on the Jenkins controller. This allows attackers with Job/Configure permission to execute an arbitrary system command on the Jenkins controller as the OS user that the Jenkins process is running as. As of publication of this advisory, there is no fix. Arbitrary file read vulnerability in Storable Configs Plugin SECURITY-1968 (1) / CVE-2020-2277 Storable Configs Plugin 1.0 and earlier allows users with Job/Read permission to read arbitrary files on the Jenkins controller. As of publication of this advisory, there is no fix. Arbitrary file write vulnerability in Storable Configs Plugin SECURITY-1968 (2) / CVE-2020-2278 Storable Configs Plugin allows storing copies of a job’s config.xml file on the Jenkins controller with a user-specified file name. Storable Configs Plugin 1.0 and earlier does not restrict the user-specified file name, except that a .xml suffix is added if it’s not already present. This allows attackers with Job/Configure permission to replace any other .xml file on the Jenkins controller with the job’s config.xml file’s content. As of publication of this advisory, there is no fix. Severity SECURITY-1813: Medium SECURITY-1851: Medium SECURITY-1869: High SECURITY-1903: Medium SECURITY-1904: Medium SECURITY-1908: High SECURITY-1911: High SECURITY-1912: High SECURITY-1913: High SECURITY-1914: High SECURITY-1916: High SECURITY-1921: High SECURITY-1927: High SECURITY-1935: High SECURITY-1956: Medium SECURITY-1961: Medium SECURITY-1966: Medium SECURITY-1967: High SECURITY-1968 (1): Medium SECURITY-1968 (2): Medium SECURITY-1976: High SECURITY-1979: Medium SECURITY-1980: High SECURITY-1998: Medium SECURITY-2014: Low Affected Versions Android Lint Plugin up to and including 2.6 Blue Ocean Plugin up to and including 1.23.2 chosen-views-tabbar Plugin up to and including 1.2 ClearCase Release Plugin up to and including 0.3 computer-queue-plugin Plugin up to and including 1.5 Copy data to workspace Plugin up to and including 1.0 Coverage/Complexity Scatter Plot Plugin up to and including 1.1.1 Custom Job Icon Plugin up to and including 0.2 Description Column Plugin up to and including 1.3 ElasTest Plugin up to and including 1.2.1 Email Extension Plugin up to and including 2.75 Health Advisor by CloudBees Plugin up to and including 3.2.0 Locked Files Report Plugin up to and including 1.6 Mailer Plugin up to and including 1.32 MongoDB Plugin up to and including 1.3 Perfecto Plugin up to and including 1.17 Pipeline Maven Integration Plugin up to and including 3.9.2 Radiator View Plugin up to and including 1.29 Selection tasks Plugin up to and including 1.0 Storable Configs Plugin up to and including 1.0 Validating String Parameter Plugin up to and including 2.4 Fix Blue Ocean Plugin should be updated to version 1.23.3 computer-queue-plugin Plugin should be updated to version 1.6 Email Extension Plugin should be updated to version 2.76 Health Advisor by CloudBees Plugin should be updated to version 3.2.1 Mailer Plugin should be updated to version 1.32.1 Perfecto Plugin should be updated to version 1.18 Pipeline Maven Integration Plugin should be updated to version 3.9.3 Validating String Parameter Plugin should be updated to version 2.5 These versions include fixes to the vulnerabilities described above. All prior versions are considered to be affected by these vulnerabilities unless otherwise indicated. As of publication of this advisory, no fixes are available for the following plugins: Android Lint Plugin chosen-views-tabbar Plugin ClearCase Release Plugin Copy data to workspace Plugin Coverage/Complexity Scatter Plot Plugin Custom Job Icon Plugin Description Column Plugin ElasTest Plugin Locked Files Report Plugin MongoDB Plugin Radiator View Plugin Selection tasks Plugin Storable Configs Plugin Credit The Jenkins project would like to thank the reporters for discovering and reporting these vulnerabilities: Daniel Beck, CloudBees, Inc. for SECURITY-1966, SECURITY-1967, SECURITY-1968 (1), SECURITY-1968 (2), SECURITY-1976 Jinchen Sheng, Ant Security FG Lab. for SECURITY-1956, SECURITY-1961 Matt Sicker, CloudBees, Inc. for SECURITY-1998 Peter Stöckli (via Github Security Lab) for SECURITY-1813 Wadeck Follonier, CloudBees, Inc. for SECURITY-1869, SECURITY-1903, SECURITY-1904, SECURITY-1908, SECURITY-1911, SECURITY-1912, SECURITY-1913, SECURITY-1914, SECURITY-1916, SECURITY-1921, SECURITY-1927, SECURITY-2014 Wadeck Follonier, CloudBees, Inc. and Daniel Beck, CloudBees, Inc. for SECURITY-1935 ========================================================= + CERT-RENATER       |    tel : 01-53-94-20-44          + + 23/25 Rue Daviel   |    fax : 01-53-94-20-41          + + 75013 Paris        |    email:cert@support.renater.fr + =========================================================