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CVE-2019-15523

An issue was discovered in LINBIT csync2 through 2.0. It does not correctly check for the return...

5.3 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
Low
Availability
None

Exploit likelihood

1.42%Up 0.8 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 5.3

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.

Record
CVE-2019-15523
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:P/A:N
Weakness
CWE-252
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2019-15523
Updated
2026-11-02
EUVDEUVD-2019-6508 No score

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.

Record
EUVD-2019-6508
Updated
2026-11-03
GitHub AdvisoriesGHSA-hw3p-w63h-mj9c No score

An issue was discovered in LINBIT csync2 through 2.0. It does not correctly check for the return...

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.

Record
GHSA-hw3p-w63h-mj9c
Weakness
CWE-252
Updated
2026-11-02
OSVALPINE-CVE-2019-15523 5.3

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.

Record
ALPINE-CVE-2019-15523
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-03
OSV 5.3

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.

Record
CVE-2019-15523
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
Show 6 moreShow less
OSVDEBIAN-CVE-2019-15523 5.3

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.

Record
DEBIAN-CVE-2019-15523
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2019-15523 5.3

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.

Record
UBUNTU-CVE-2019-15523
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
OSVopenSUSE-SU-2021:0853-1 No score

Security update for csync2

This update for csync2 fixes the following issues:

  • CVE-2019-15522: Fixed an issue where daemon fails to enforce TLS (bsc#1147137)
  • CVE-2019-15523: Fixed an incorrect TLS handshake error handling (bsc#1147139)

This update was imported from the SUSE:SLE-15:Update update project.

Record
openSUSE-SU-2021:0853-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:10706-1 No score

csync2-2.0+git.1600444747.83b3644-1.3 on GA media

These are all security issues fixed in the csync2-2.0+git.1600444747.83b3644-1.3 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10706-1
Updated
2026-11-02
OSVSUSE-SU-2021:1858-1 No score

Security update for csync2

This update for csync2 fixes the following issues:

  • CVE-2019-15522: Fixed an issue where daemon fails to enforce TLS (bsc#1147137)
  • CVE-2019-15523: Fixed an incorrect TLS handshake error handling (bsc#1147139)
Record
SUSE-SU-2021:1858-1
Updated
2026-11-02
OSVSUSE-SU-2021:1952-1 No score

Security update for csync2

This update for csync2 fixes the following issues:

  • CVE-2019-15522: Fixed an issue where daemon fails to enforce TLS (bsc#1147137)
  • CVE-2019-15523: Fixed an incorrect TLS handshake error handling (bsc#1147139)
Record
SUSE-SU-2021:1952-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
csync2
Alpine:v3.14
 before 2.0-r3
2.0-r3
csync2
Alpine:v3.15
 before 2.0-r3
2.0-r3
csync2
Alpine:v3.16
 before 2.0-r3
2.0-r3
csync2
Alpine:v3.17
 before 2.0-r3
2.0-r3
csync2
Alpine:v3.18
 before 2.0-r3
2.0-r3
csync2
Alpine:v3.19
 before 2.0-r3
2.0-r3
csync2
Alpine:v3.20
 before 2.0-r3
2.0-r3
csync2
Alpine:v3.21
 before 2.0-r3
2.0-r3
csync2
Alpine:v3.22
 before 2.0-r3
2.0-r3
csync2
Alpine:v3.23
 before 2.0-r3
2.0-r3
Show 16 moreShow less
Affected packages
PackageAffectedFixed
csync2
Alpine:v3.24
 before 2.0-r3
2.0-r3
csync2
Debian:12
 before 2.0-25-gc0faaf9-1
2.0-25-gc0faaf9-1
csync2
Debian:13
 before 2.0-25-gc0faaf9-1
2.0-25-gc0faaf9-1
csync2
Debian:14
 before 2.0-25-gc0faaf9-1
2.0-25-gc0faaf9-1
csync2
Debian:9
 before 2.0-8-g175a01c-4+deb9u2, plus listed versions
2.0-8-g175a01c-42.0-8-g175a01c-4+deb9u1
2.0-8-g175a01c-4+deb9u2
csync2
SUSE:Linux Enterprise High Availability Extension 15
 before 2.0+git.1461714863.10636a4-4.6.1
2.0+git.1461714863.10636a4-4.6.1
csync2
SUSE:Linux Enterprise High Availability Extension 15 SP1
 before 2.0+git.1461714863.10636a4-4.6.1
2.0+git.1461714863.10636a4-4.6.1
csync2
SUSE:Linux Enterprise High Availability Extension 15 SP2
 before 2.0+git.1461714863.10636a4-4.6.1
2.0+git.1461714863.10636a4-4.6.1
csync2
SUSE:Linux Enterprise High Availability Extension 12 SP3
 before 2.0+git.1368794815.cf835a7-3.9.5
2.0+git.1368794815.cf835a7-3.9.5
csync2
SUSE:Linux Enterprise High Availability Extension 12 SP4
 before 2.0+git.1368794815.cf835a7-3.9.5
2.0+git.1368794815.cf835a7-3.9.5
csync2
SUSE:Linux Enterprise High Availability Extension 12 SP5
 before 2.0+git.1368794815.cf835a7-3.9.5
2.0+git.1368794815.cf835a7-3.9.5
csync2
Ubuntu:16.04:LTS
 All versions, plus listed versions
2.0+73d3293-22.0+73d3293-2build12.0+73d3293-2build2
 None known
csync2
Ubuntu:18.04:LTS
 All versions, plus listed versions
2.0-8-g175a01c-4ubuntu1
 None known
csync2
Ubuntu:20.04:LTS
 All versions, plus listed versions
2.0-8-g175a01c-4ubuntu22.0-22-gce67c55-1ubuntu1
 None known
csync2
openSUSE:Leap 15.2
 before 2.0+git.1461714863.10636a4-lp152.5.3.1
2.0+git.1461714863.10636a4-lp152.5.3.1
csync2
openSUSE:Tumbleweed
 before 2.0+git.1600444747.83b3644-1.3
2.0+git.1600444747.83b3644-1.3

History

History
RecordedChangedSources
affected, aliases, referencesOSV
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-15523 is a medium vulnerability (CVSS 5.3) in Linbit Csync2, published December 30, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.42%, the 72nd percentile. Fixed in csync2 2.0-r3.

References

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