Security Advisory for Bugzilla 2.20, 2.21.1, and 2.18.4

Risk: Medium
Local: No
Remote: Yes

CVSS Base Score: 7.5/10
Impact Subscore: 6.4/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

Summary ======= Bugzilla is a Web-based bug-tracking system, used by a large number of software projects. This advisory covers three security bugs that have recently been discovered and fixed in the Bugzilla code: + The 'whinedays' and 'mostfreqthreshold' parameters are not correctly validated in editparams.cgi. The first one can lead to SQL injection. + Escaped HTML markup in titles of RSS feeds are incorrectly decoded by some RSS readers and could potentially lead to XSS vulnerabilities. + The login form on the home page, in conjuction with very specific configuation settings and a specially formed URL, may redirect you outside the Bugzilla installation, allowing the login name and password to be stolen. All Bugzilla installations are advised to upgrade to the latest stable version of Bugzilla, 2.20.1. Development snapshots of 2.21 before 2.22rc1 are also vulnerable. If you are using a development snapshot, you should upgrade to 2.22rc1, use CVS to update, or apply the patches from the specific bugs listed below. None of these vulnerabilities affect the old Bugzilla 2.16.x versions. Vulnerability Details ===================== Issue 1 ------- Class: SQL injection Versions: 2.17.1 and above Description: The 'whinedays' parameter, editable from editparams.cgi, is not validated before being saved. This can lead to SQL injection in the script. This injection requires administrative privileges. The validation for the 'mostfreqthreshold' parameter is also missing, but this is not exploitable. Reference: Issue 2 ------- Class: Cross Site Scripting Versions: 2.20rc1 - 2.20, 2.21.1 Description: Some RSS readers incorrectly decode escaped HTML markup in feed titles and this could be used to inject some scripts. Although this is not a Bugzilla bug, we prefer to shift to Atom feeds, where the RFC is unambiguous about HTML markup in feed titles. Reference: Issue 3 ------- Class: Sensitive Data Exposure Versions: 2.19.3 and above Description: When the Bugzilla login page is at a subdirectory of the web server and the subdirectory name is a resolvable host on the victim's local network, it is possible to craft a URL that, when used to login to Bugzilla, would send the user's credentials to this host. These conditions make this flaw very difficult to exploit. Reference: Vulnerability Solutions ======================= The fixes for all of the security bugs mentioned in this advisory are included in the 2.18.5, 2.20.1, and 2.22rc1 releases. Upgrading to these releases will protect installations from possible exploits of these issues. Full release downloads, patches to upgrade Bugzilla from previous versions, and CVS upgrade instructions are available at: Specific patches for each of the individual issues can be found on the corresponding bug reports for each issue, at the URL given in the reference for that issue in the list above. Credits ======= The Bugzilla team wish to thank the following people for their assistance in locating, advising us of, and assisting us to fix these situations: Frdric Buclin Phil Ringnalda Myk Melez Teemu Mannermaa General information about the Bugzilla bug-tracking system can be found at Comments and follow-ups can be directed to the netscape.public.mozilla.webtools newsgroup or the mozilla-webtools mailing list; has directions for accessing these forums.

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