Bug 1475233 (CVE-2017-2835)

Summary: CVE-2017-2835 freerdp: Out-of-bounds write in rdp_recv_tpkt_pdu
Product: [Other] Security Response Reporter: Adam Mariš <amaris>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: mads, negativo17, oholy, pahan, pokorra.mailinglists
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Last Closed: 2017-08-07 13:59:02 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 1475245, 1475246, 1475247    
Bug Blocks: 1475243    

Description Adam Mariš 2017-07-26 09:08:56 UTC
An exploitable code execution vulnerability exists in the RDP receive functionality of FreeRDP 2.0.0-beta1+android11. A specially crafted server response can cause an out-of-bounds write resulting in an exploitable condition. An attacker can compromise the server or use a man in the middle to trigger this vulnerability.

The vulnerability is located in the RDP received function of FreeRDP. Similar to the previous vulnerability, the RDP message sent from the server contains a length field, but this field is not verified by the FreeRDP client code. This length can become negative and allows the attacker to execute code on the client side.

External References:

https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0337
http://blog.talosintelligence.com/2017/07/vulnerbility-spotlight-freerdp-multiple.html

Comment 1 Adam Mariš 2017-07-26 09:31:04 UTC
Created freerdp tracking bugs for this issue:

Affects: epel-6 [bug 1475247]
Affects: fedora-all [bug 1475246]


Created freerdp1.2 tracking bugs for this issue:

Affects: fedora-all [bug 1475245]

Comment 3 Stefan Cornelius 2017-08-07 13:59:09 UTC
Statement:

Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.