MEDIUM
CVE-2019-15523
CWE-252Published: December 30, 2020· Updated: Jun 17, 2026
5.3
CVSS v3.1
Official Description
An issue was discovered in LINBIT csync2 through 2.0. It does not correctly check for the return value GNUTLS_E_WARNING_ALERT_RECEIVED of the gnutls_handshake() function. It neglects to call this function again, as required by the design of the API.
Technical Analysis
CVE-2019-15523 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories
All References (4)
→
https://github.com/LINBIT/csync2/pull/13/commits/92742544a56bcbcd9ec99ca15f898b31797e39e2Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2021/01/msg00003.htmlMailing List · Third Party Advisory
→
https://github.com/LINBIT/csync2/pull/13/commits/92742544a56bcbcd9ec99ca15f898b31797e39e2Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2021/01/msg00003.htmlMailing List · Third Party Advisory
Quick Facts
CVE IDCVE-2019-15523
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-252
CISA KEVNo
Affected2 vendor(s)
PublishedDec 30, 2020
Related CVEs (CWE-252)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-15523 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.