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Fencer Vulns
medium 5.3

CVE-2019-15523 json

An issue was discovered in LINBIT csync2 through 2.0.

published 2020-12-30 5 y ago modified 2026-06-17 4 mo ago also EUVD-2019-6508

cvss
5.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits
0
none known

Summary

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.

Patch / fix

  • csync2 Debian 14, Debian 13, Debian 12 2.0-25-gc0faaf9-1

debian advisories DEBIAN-CVE-2019-15523

  • csync2 SLE High Availability Extension 12 SP5, SLE High Availability Extension 12 SP4, SLE High Availability Extension 12 SP3 2.0+git.1368794815.cf835a7-3.9.5
  • csync2 SLE High Availability Extension 15 SP2, SLE High Availability Extension 15 SP1, SLE High Availability Extension 15 2.0+git.1461714863.10636a4-4.6.1

suse advisories SUSE-SU-2021:1952-1SUSE-SU-2021:1858-1

  • csync2 openSUSE Tumbleweed 2.0+git.1600444747.83b3644-1.3
  • csync2 openSUSE Leap 15.2 2.0+git.1461714863.10636a4-lp152.5.3.1

opensuse advisories openSUSE-SU-2024:10706-1openSUSE-SU-2021:0853-1

  • csync2 Alpine 3.24, Alpine 3.23, Alpine 3.22 +8 more 2.0-r3

alpine advisories ALPINE-CVE-2019-15523

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-15523 updated cvss 5.3

csync2: does not correctly check for the return value GNUTLS_E_WARNING_ALERT_RECEIVED of the gnutls_handshake() function

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.42% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.