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Bamboo 6.x Remote Code Execution

Bamboo 6.x Remote Code Execution
Posted Oct 27, 2017
Authored by Atlassian

Bamboo versions prior to 6.0.5, 6.1.4, and 6.2.1 suffer from a code execution vulnerability.

tags | advisory, code execution
advisories | CVE-2017-9514
MD5 | ae8cac2b1f1ed2cdeec18149785fad9f

Bamboo 6.x Remote Code Execution

Change Mirror Download
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This email refers to the advisory found at
https://confluence.atlassian.com/x/EZ-1Nw .


CVE ID:

* CVE-2017-9514.


Product: Bamboo.

Affected Bamboo product versions:

6.0.0 <= version < 6.0.5
6.1.0 <= version < 6.1.4
6.2.0 <= version < 6.2.1


Fixed Bamboo product versions:

* for 6.0.x, Bamboo 6.0.5 has been released with a fix for this issue.
* for 6.1.x, Bamboo 6.1.4 has been released with a fix for this issue.
* for 6.2.x, Bamboo 6.2.1 has been released with a fix for this issue.


Summary:
This advisory discloses a critical severity security vulnerability
that was introduced in version 6.0.0 of Bamboo. Versions of Bamboo
starting with 6.0.0 before 6.0.5 (the fixed version for 6.0.x) and
from 6.1.0 before 6.1.4 (the fixed version for 6.1.x) are affected by
this vulnerability.

Cloud instances aren't affected by the issue described in this email.

Customers who have upgraded Bamboo to version 6.0.5 or 6.1.4 or 6.2.1
are not affected.

Customers who have downloaded and installed Bamboo >= 6.0.0 but less
than 6.0.5 (the fixed version for 6.0.x) or who have downloaded and
installed Bamboo >= 6.1.0 but less than 6.1.4 (the fixed version for
6.1.x) or who have downloaded and installed Bamboo >= 6.2.0 but less
than 6.2.1 (the fixed version for 6.2.x) please upgrade your Bamboo
installations immediately to fix this vulnerability.


Remote Code Execution (CVE-2017-8907)

Severity:
Atlassian rates the severity level of this vulnerability as critical,
according to the scale published in our Atlassian severity levels. The
scale allows us to rank the severity as critical, high, moderate or
low.
This is our assessment and you should evaluate its applicability to
your own IT environment.


Description:

Bamboo has a resource which accepts a YAML file and did not
sufficiently restrict which classes could be loaded. An attacker who
can login to Bamboo as a user is able to use this vulnerability to
execute Java code of their choice on systems that have a vulnerable
version of Bamboo.
Versions of Bamboo starting with 6.0.0 before 6.0.5 (the fixed version
for 6.0.x) and from 6.1.0 before 6.1.4 (the fixed version for 6.1.x)
are affected by this vulnerability. This issue can be tracked at:
https://jira.atlassian.com/browse/BAM-18735 .


Fix:

To address this issue, we've released the following versions containing a fix:

* Bamboo version 6.0.5
* Bamboo version 6.1.4
* Bamboo version 6.2.1

Remediation:

Upgrade Bamboo to version 6.2.1 or higher.

The vulnerabilities and fix versions are described above. If affected,
you should upgrade to the latest version immediately.

If you are running Bamboo 6.0.x and cannot upgrade to 6.2.1, upgrade
to version 6.0.5.
If you are running Bamboo 6.1.x and cannot upgrade to 6.2.1, upgrade
to version 6.1.4.


For a full description of the latest version of Bamboo, see
the release notes found at
https://confluence.atlassian.com/display/BAMBOO/Bamboo+releases. You
can download the latest version of Bamboo from the download centre
found at https://www.atlassian.com/software/bamboo/download.



Support:
If you have questions or concerns regarding this advisory, please
raise a support request at https://support.atlassian.com/.
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