Bug 1858253 (CVE-2020-15117) - CVE-2020-15117 synergy: kMsgHelloBack packet with client name length of 0xffffffff causing DoS
Summary: CVE-2020-15117 synergy: kMsgHelloBack packet with client name length of 0xff...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2020-15117
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: 1858255 1858254
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-07-17 11:21 UTC by Dhananjay Arunesh
Modified: 2020-07-17 13:27 UTC (History)
3 users (show)

Fixed In Version:
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Last Closed: 2020-07-17 13:27:47 UTC
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Description Dhananjay Arunesh 2020-07-17 11:21:31 UTC 
In Synergy before version 1.12.0, a Synergy server can be crashed by receiving a kMsgHelloBack packet with a client name length set to 0xffffffff (4294967295) if the servers memory is less than 4 GB. It was verified that this issue does not cause a crash through the exception handler if the available memory of the Server is more than 4GB.

References:
https://github.com/symless/synergy-core/commit/0a97c2be0da2d0df25cb86dfd642429e7a8bea39
https://github.com/symless/synergy-core/security/advisories/GHSA-chfm-333q-gfpp
Comment 1 Dhananjay Arunesh 2020-07-17 11:22:13 UTC 
Created synergy tracking bugs for this issue:

Affects: epel-all [bug 1858255]
Affects: fedora-all [bug 1858254]
Comment 2 Product Security DevOps Team 2020-07-17 13:27:47 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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