Mozilla Firefox 3.6a1, 3.5.3, 3.5.2, and earlier 3.5.x versions, and 3.0.14 and earlier 2.x and 3.x versions, on Linux uses a predictable /tmp pathname for files selected from the Downloads window, which allows local users to replace an arbitrary downloaded file by placing a file in a /tmp location before the download occurs, related to the Download Manager component. NOTE: some of these details are obtained from third party information.
http://jbrownsec.blogspot.com/2009/09/vamos-updates.html
http://secunia.com/advisories/36649
http://securitytube.net/Zero-Day-Demos-(Firefox-Vulnerability-Discovered)-video.aspx
http://sunsolve.sun.com/search/document.do?assetkey=1-26-272909-1
http://www.mandriva.com/security/advisories?name=MDVSA-2009:294
http://www.mozilla.org/security/announce/2009/mfsa2009-53.html
http://www.redhat.com/support/errata/RHSA-2010-0153.html
http://www.redhat.com/support/errata/RHSA-2010-0154.html
http://www.vupen.com/english/advisories/2009/3334
http://www.vupen.com/english/advisories/2010/0650
https://bugzilla.mozilla.org/show_bug.cgi?id=514823
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9641
Source: MITRE
Published: 2009-09-21
Updated: 2018-08-13
Type: NVD-CWE-Other
Base Score: 4.4
Vector: AV:L/AC:M/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 3.4
Severity: MEDIUM