Denial of Service in Synergy
Priority LOW 34CWE-755Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.02494 84th percentileScored 2026-11-07
Fix Fixed synergy-core (symless): 1.12.0
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| symless | synergy-core | before 1.12.0 | 1.12.0 | Patch available | CNA |
- synergy-core Vendorsymless Affected before 1.12.0 Fixed in 1.12.0 Patch available CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:symless:synergy:*:*:*:*:*:*:*:* | before 1.12.0 | Vulnerable | symless |
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | 32 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
- cpe:2.3:a:symless:synergy:*:*:*:*:*:*:*:* Versions before 1.12.0 Vulnerable ·symless
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
Remediation
- Fix · CNA synergy-core (symless) Fixed in 1.12.0
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2020-15117
References
Sources
- CVE-2020-15117 · CVE Program
- CVE-2020-15117 · NVD
- FIRST EPSS
- CVE-2020-15117 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences