Vulnerability in Symless Synergy
CVE-2020-15117
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.025 (84.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: 0.000
Affected products
- Symless Synergy
- Symless Synergy-Core — versions < 1.12.0
- Fedoraproject Fedora — versions 32, 33
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/symless/synergy-core/security/advisories/GHSA-chfm-333q-gfpp (Third Party Advisory)
- github.com/symless/synergy-core/commit/0a97c2be0da2d0df25cb86dfd642429e7a8bea39 (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2020-15117?
- CVE-2020-15117 is a medium-severity vulnerability in Symless Synergy, classified under Improper Handling of Exceptional Conditions. CVSS score: 6.5/10. Published 2020-07-15.
- How severe is CVE-2020-15117?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2020-15117 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.