Deskflow: TLS multiplexer DoS on failed `SSL_accept`
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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| deskflow | deskflow | affected |
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No data.
No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Deskflow | Deskflow |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.279% probability within 30 days)
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| Metrics |
ssvc
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| First Time appeared |
Deskflow
Deskflow deskflow |
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| Vendors & Products |
Deskflow
Deskflow deskflow |
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| Description | Deskflow is a keyboard and mouse sharing app. Prior to 1.26.0.167, a remote, unauthenticated denial of service (DoS) vulnerability affects Deskflow servers running with TLS enabled (the default). When any TCP peer connects to the listening port and its first bytes do not parse as a valid TLS ClientHello, SecureSocket::secureAccept enters its fatal-error branch and calls Arch::sleep(1) (a blocking 1-second sleep) on the multiplexer worker thread. That thread services every socket on the server, including established TLS clients delivering mouse motion, keyboard events, and clipboard updates. A single failed handshake therefore stalls input delivery to all connected screens for ~1 second, and a sustained drip of malformed connections (≥ 1/s) makes the server effectively unusable while the attack persists. This vulnerability is fixed in 1.26.0.167. | |
| Title | Deskflow: TLS multiplexer DoS on failed `SSL_accept` | |
| Weaknesses | CWE-400 CWE-405 |
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| References |
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| Metrics |
cvssV3_1
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