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AUSCERT External Security Bulletin Redistribution
ESB-2019.1994
buildbot -- OAuth Authentication Vulnerability
4 June 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: buildbot
Publisher: FreeBSD
Operating System: FreeBSD
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-12300
Original Bulletin:
http://www.vuxml.org/freebsd/ada8db8a-8471-11e9-8170-0050562a4d7b.html
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FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports
Collection
buildbot -- OAuth Authentication Vulnerability
Affected packages
py27-buildbot < 2.3.1
py35-buildbot < 2.3.1
py36-buildbot < 2.3.1
py37-buildbot < 2.3.1
Details
VuXML ID ada8db8a-8471-11e9-8170-0050562a4d7b
Discovery 2019-05-07
Entry 2019-06-01
Buildbot accepted user-submitted authorization token from OAuth and used it
to authenticate user.
The vulnerability can lead to malicious attackers to authenticate as
legitimate users of a Buildbot instance without knowledge of the victim's
login credentials on certain scenarios.
If an attacker has an application authorized to access data of another user
at the same Identity Provider as the used by the Buildbot instance, then he
can acquire a token to access the data of that user, supply the token to
the Buildbot instance and successfully login as the victim.
[source]
References
CVE CVE-2019-12300
Name
URL https://github.com/buildbot/buildbot/pull/4763
URL https://github.com/buildbot/buildbot/wiki/
OAuth-vulnerability-in-using-submitted-authorization-token-for-authentication
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