Bug 1475236 (CVE-2017-2838) - CVE-2017-2838 freerdp: Rdp Client License Read Product Info Denial of Service
Summary: CVE-2017-2838 freerdp: Rdp Client License Read Product Info Denial of Service
Alias: CVE-2017-2838
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1475245 1475247 1475246
Blocks: 1475243
TreeView+ depends on / blocked
Reported: 2017-07-26 09:16 UTC by Adam Mariš
Modified: 2019-09-29 14:17 UTC (History)
5 users (show)

Fixed In Version:
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Last Closed: 2017-08-07 13:59:06 UTC

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Description Adam Mariš 2017-07-26 09:16:54 UTC
An exploitable denial of service vulnerability exists within the handling of challenge packets in FreeRDP 2.0.0-beta1+android11. A specially crafted challenge packet can cause the program termination leading to a denial of service condition. An attacker can compromise the server or use man in the middle to trigger this vulnerability.

The vulnerability is located in the license read product info handling. A malicious crafted packet may cause the application to crash. The vulnerable code reads in an unsigned integer from the server message which then incremented by four as part of a length check. However, the size of the unsigned integer is never validated and thus the addition of four could cause an overflow and result in the client crashing.

External References:


Comment 1 Adam Mariš 2017-07-26 09:31:30 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 13:59:14 UTC

Red Hat Product Security has rated this issue as having Low 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/.

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