ESB-2018.1133 - [Win][UNIX/Linux] Jenkins: Cross-site scripting - Existing account 2018-04-12

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             AUSCERT External Security Bulletin Redistribution

                   Jenkins Security Advisory 2018-04-11
                               12 April 2018


        AusCERT Security Bulletin Summary

Product:           Jenkins
Publisher:         Jenkins
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Cross-site Scripting     -- Existing Account
                   Access Confidential Data -- Existing Account
Resolution:        Patch/Upgrade

Original Bulletin:

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Jenkins Security Advisory 2018-04-11

This advisory announces vulnerabilities in the following Jenkins deliverables:

  * Jenkins (core)


CLI leaked existence of views and agents with attacker-specified names to users
without Overall/Read permission

SECURITY-754 / CVE pending

The Jenkins CLI sent different error responses for commands with view and agent
arguments depending on the existence of the specified views or agents to
unauthorized users. This allowed attackers to determine whether views or agents
with specified names exist.

The Jenkins CLI now returns the same error messages to unauthorized users
independent of the existence of specified view or agent names.

Cross-site scripting vulnerability in confirmation dialogs displaying item

SECURITY-759 / CVE pending

Some JavaScript confirmation dialogs included the item name in an unsafe
manner, resulting in a possible cross-site scripting vulnerability exploitable
by users with permission to create or configure items.

JavaScript confirmation dialogs that include the item name now properly escape
it, so it can be safely displayed.


  * SECURITY-754: low
  * SECURITY-759: medium

Affected Versions

  * Jenkins weekly up to and including 2.115
  * Jenkins LTS up to and including 2.107.1


  * Jenkins weekly should be updated to version 2.116
  * Jenkins LTS should be updated to version 2.107.2

These versions include fixes to the vulnerabilities described above. All prior
versions are considered to be affected by these vulnerabilities unless
otherwise indicated.


The Jenkins project would like to thank the reporters for discovering and
reporting these vulnerabilities:

  * Assaf Berg for SECURITY-754
  * Jesper den Boer for SECURITY-759

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