CVE-2019-20503

Name: CVE-2019-20503
Creator: NVD / NIST
Published: 2020-03-06T20:15:12.47+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 3.16%

Last modified Jun 17, 2026

CVE-2019-20503 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. usrsctp before 2019-12-20 has out-of-bounds reads in sctp_load_addresses_from_init.. EPSS estimates a 3.16% chance of exploitation in the next 30 days.

Description

usrsctp before 2019-12-20 has out-of-bounds reads in sctp_load_addresses_from_init.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

3.16%

86.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Usrsctp Project	Usrsctp	< 0.9.4.0
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	19.10

References

http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00022.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00028.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00030.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00037.htmlMailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/May/49Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/May/52Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/May/55Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/May/59Mailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0815Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0816Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0819Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0820Third Party Advisory
https://bugs.chromium.org/p/project-zero/issues/detail?id=1992Exploit, Patch, Vendor Advisory
https://chromereleases.googleblog.com/2020/03/stable-channel-update-for-desktop_18.htmlThird Party Advisory
https://crbug.com/1059349Third Party Advisory
https://github.com/sctplab/usrsctp/commit/790a7a2555aefb392a5a69923f1e9d17b4968467Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/03/msg00013.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/03/msg00023.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/07/msg00003.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2DDNOAGIX5D77TTHT6YPMVJ5WTXTCQEI/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IOHSO6BUKC6I66J5PZOMAGFVJ66ZS57/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JWANFIR3PYAL5RJQ4AO3ZS2DYMSF2ZGZ/Mailing List, Third Party Advisory
https://security.gentoo.org/glsa/202003-02Third Party Advisory
https://security.gentoo.org/glsa/202003-10Third Party Advisory
https://support.apple.com/HT211168Third Party Advisory
https://support.apple.com/HT211171Third Party Advisory
https://support.apple.com/HT211175Third Party Advisory
https://support.apple.com/HT211177Third Party Advisory
https://support.apple.com/kb/HT211168Third Party Advisory
https://support.apple.com/kb/HT211171Third Party Advisory
https://support.apple.com/kb/HT211175Third Party Advisory
https://support.apple.com/kb/HT211177Third Party Advisory
https://usn.ubuntu.com/4299-1/Third Party Advisory
https://usn.ubuntu.com/4328-1/Third Party Advisory
https://usn.ubuntu.com/4335-1/Third Party Advisory
https://www.debian.org/security/2020/dsa-4639Third Party Advisory
https://www.debian.org/security/2020/dsa-4642Third Party Advisory
https://www.debian.org/security/2020/dsa-4645Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00022.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00028.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00030.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00037.htmlMailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/May/49Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/May/52Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/May/55Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/May/59Mailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0815Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0816Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0819Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0820Third Party Advisory
https://bugs.chromium.org/p/project-zero/issues/detail?id=1992Exploit, Patch, Vendor Advisory
https://chromereleases.googleblog.com/2020/03/stable-channel-update-for-desktop_18.htmlThird Party Advisory
https://crbug.com/1059349Third Party Advisory
https://github.com/sctplab/usrsctp/commit/790a7a2555aefb392a5a69923f1e9d17b4968467Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/03/msg00013.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/03/msg00023.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/07/msg00003.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2DDNOAGIX5D77TTHT6YPMVJ5WTXTCQEI/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IOHSO6BUKC6I66J5PZOMAGFVJ66ZS57/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JWANFIR3PYAL5RJQ4AO3ZS2DYMSF2ZGZ/Mailing List, Third Party Advisory
https://security.gentoo.org/glsa/202003-02Third Party Advisory
https://security.gentoo.org/glsa/202003-10Third Party Advisory
https://support.apple.com/HT211168Third Party Advisory
https://support.apple.com/HT211171Third Party Advisory
https://support.apple.com/HT211175Third Party Advisory
https://support.apple.com/HT211177Third Party Advisory
https://support.apple.com/kb/HT211168Third Party Advisory
https://support.apple.com/kb/HT211171Third Party Advisory
https://support.apple.com/kb/HT211175Third Party Advisory
https://support.apple.com/kb/HT211177Third Party Advisory
https://usn.ubuntu.com/4299-1/Third Party Advisory
https://usn.ubuntu.com/4328-1/Third Party Advisory
https://usn.ubuntu.com/4335-1/Third Party Advisory
https://www.debian.org/security/2020/dsa-4639Third Party Advisory
https://www.debian.org/security/2020/dsa-4642Third Party Advisory
https://www.debian.org/security/2020/dsa-4645Third Party Advisory

Timeline

Published: Mar 6, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-20503?

usrsctp before 2019-12-20 has out-of-bounds reads in sctp_load_addresses_from_init.

How severe is CVE-2019-20503?

CVE-2019-20503 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 3.16% probability of exploitation in the next 30 days.

How do I fix CVE-2019-20503?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-20503?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST