Bug 1853385 (CVE-2020-9498) - CVE-2020-9498 guacamole-server: Dangling pointer in RDP static virtual channel handling
Summary: CVE-2020-9498 guacamole-server: Dangling pointer in RDP static virtual channe...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2020-9498
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1853386 1853387 1853388
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-07-02 14:33 UTC by Michael Kaplan
Modified: 2021-02-16 19:43 UTC (History)
1 user (show)

Fixed In Version:
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Last Closed: 2020-07-02 19:27:37 UTC
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Description Michael Kaplan 2020-07-02 14:33:35 UTC 
Apache Guacamole 1.1.0 and older may mishandle pointers involved in
processing data received via RDP static virtual channels. If a user
connects to a malicious or compromised RDP server, a series of
specially-crafted PDUs could result in memory corruption, possibly
allowing arbitrary code to be executed with the privileges of the
running guacd process.

Mitigation:
Users of versions of Apache Guacamole 1.1.0 and older that provide
access to untrusted RDP servers should upgrade to 1.2.0.
Comment 1 Michael Kaplan 2020-07-02 14:33:57 UTC 
Created guacamole-server tracking bugs for this issue:

Affects: epel-6 [bug 1853387]
Affects: epel-7 [bug 1853388]
Affects: fedora-all [bug 1853386]
Comment 2 Michael Kaplan 2020-07-02 14:36:04 UTC 
External References:

https://lists.apache.org/thread.html/rff824b38ebd2fddc726b816f0e509696b83b9f78979d0cd021ca623b%40%3Cannounce.guacamole.apache.org%3E
Comment 3 Product Security DevOps Team 2020-07-02 19:27:37 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
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