Skip to content
Fencer Vulns
medium 5.9

CVE-2019-1559 json

0-byte record padding oracle

published 2019-02-27 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-10116

cvss
5.9
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
17.1%
EPSS 17.1% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

If an application encounters a fatal protocol error and then calls SSL_shutdown() twice (once to send a close_notify, and once to receive one) then OpenSSL can respond differently to the calling application if a 0 byte record is received with invalid padding compared to if a 0 byte record is received with an invalid MAC. If the application then behaves differently based on that in a way that is detectable to the remote peer, then this amounts to a padding oracle that could be used to decrypt data. In order for this to be exploitable "non-stitched" ciphersuites must be in use. Stitched ciphersuites are optimised implementations of certain commonly used ciphersuites. Also the application must call SSL_shutdown() twice even if a protocol error has occurred (applications should not do this but some do anyway). Fixed in OpenSSL 1.0.2r (Affected 1.0.2-1.0.2q).

Patch / fix

  • openssl openssl 1.0.2r
  • mcafee data_exchange_layer 6.0.0
  • mcafee threat_intelligence_exchange_server 3.0.0
  • mcafee web_gateway 9.0.0
  • nodejs node.js 6.17.0, 8.15.1
  • paloaltonetworks pan-os 7.1.15, 8.0.20, 8.1.8, 9.0.2
  • openssl Debian 14, Debian 13, Debian 12 1.1.0b-2

debian advisories DEBIAN-CVE-2019-1559

  • openssl Ubuntu 16.04 LTS 1.0.2g-1ubuntu4.15
  • openssl1.0 Ubuntu 18.04 LTS 1.0.2n-1ubuntu5.3
  • openssl Ubuntu Pro 14.04 LTS 1.0.1f-1ubuntu2.27+esm1

ubuntu advisories UBUNTU-CVE-2019-1559

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • rhvm-appliance RHEL 7 2:4.3-20190722.0.el7
  • jws5-ecj jboss enterprise web server 5.2 4.12.0-1.redhat_1.1.el6jws
  • jws5-ecj jboss enterprise web server 5.2 4.12.0-1.redhat_1.1.el7jws
  • jws5-ecj jboss enterprise web server 5.2 4.12.0-1.redhat_1.1.el8jws
  • jws5-tomcat jboss enterprise web server 5.2 9.0.21-10.redhat_4.1.el6jws
  • jws5-tomcat jboss enterprise web server 5.2 9.0.21-10.redhat_4.1.el7jws
  • jws5-tomcat jboss enterprise web server 5.2 9.0.21-10.redhat_4.1.el8jws
  • jws5-tomcat-lib jboss enterprise web server 5.2 9.0.21-10.redhat_4.1.el6jws

red hat advisories RHSA-2019:2439RHSA-2019:3929RHSA-2019:2437RHSA-2019:2304RHSA-2019:2471

  • openssl SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 0.9.8j-0.106.21.1
  • compat-openssl098 SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES for SAP 12 SP2 +4 more 0.9.8j-106.12.1
  • openssl1 SLES 11-SECURITY 1.0.1g-0.58.18.1
  • nodejs6 SLE Module for Web and Scripting 12, OpenStack Cloud Crowbar 8, OpenStack Cloud 7 +1 more 6.17.0-11.24.1
  • openssl SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES 12 SP3 +6 more 1.0.2j-60.49.1
  • nodejs4 SLE Module for Web and Scripting 12, Enterprise Storage 4 4.9.1-15.20.1
  • openssl-1_0_0 SLE Module for Legacy 15 1.0.2p-3.14.2
  • openssl-1_0_0 SLES for SAP 12 SP4, SLES 12 SP4, SLED 12 SP4 +1 more 1.0.2p-3.6.1

suse advisories SUSE-SU-2019:14092-1SUSE-SU-2019:1608-1SUSE-SU-2019:1553-1SUSE-SU-2019:14091-1SUSE-SU-2019:1362-1SUSE-SU-2019:0818-1

  • openssl-1_0_0 openSUSE Tumbleweed 1.0.2u-6.2
  • openssl-1_0_0 openSUSE Leap 15.1 1.0.2p-lp151.5.3.1
  • openssl-1_0_0 openSUSE Leap 15.0 1.0.2p-lp150.2.13.1

opensuse advisories openSUSE-SU-2024:11126-1openSUSE-SU-2019:1432-1openSUSE-SU-2019:1105-1

  • openssl Alpine 3.8, Alpine 3.7, Alpine 3.6 1.0.2r-r0

alpine advisories ALPINE-CVE-2019-1559

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-2019-1559 updated cvss 5.9

openssl: 0-byte record padding oracle

  • Red Hat Enterprise Linux 5 openssl, openssl097a Red Hat Enterprise Linux 6 openssl098e Red Hat Enterprise Linux 7 OVMF, openssl098e Red Hat Enterprise Linux 8 compat-openssl10
    affected: workaround, no fix planned “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.”
  • Red Hat JBoss Core Services jbcs-httpd24-openssl
    affected: workaround, no fix available “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.”
  • Red Hat JBoss Enterprise Application Platform 5 openssl Red Hat JBoss Enterprise Application Platform 6 openssl Red Hat JBoss Enterprise Web Server 2 openssl Red Hat JBoss Web Server 3 openssl
    affected: workaround, no fix planned “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.”
  • Red Hat Ansible Tower 3.4 for RHEL 7 Server ansible-tower-34/ansible-tower-memcached 1.4.15-28, ansible-tower-35/ansible-tower-memcached 1.4.15-28, ansible-tower-37/ansible-tower-memcached-rhel7 1.4.15-28
    fixed: vendor fix “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.” RHBA-2020:0547
  • Red Hat Enterprise Linux Client (v. 7) openssl 1.0.2k-19.el7, openssl-libs 1.0.2k-19.el7 Red Hat Enterprise Linux Client Optional (v. 7) openssl-perl 1.0.2k-19.el7 Red Hat Enterprise Linux ComputeNode (v. 7) openssl 1.0.2k-19.el7, openssl-libs 1.0.2k-19.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) openssl-perl 1.0.2k-19.el7
    fixed: vendor fix “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.” RHSA-2019:2304
  • Red Hat Enterprise Linux Desktop (v. 6) openssl 1.0.1e-58.el6_10 Red Hat Enterprise Linux Desktop Optional (v. 6) openssl-perl 1.0.1e-58.el6_10 Red Hat Enterprise Linux HPC Node (v. 6) openssl 1.0.1e-58.el6_10 Red Hat Enterprise Linux HPC Node Optional (v. 6) openssl-perl 1.0.1e-58.el6_10 Red Hat Enterprise Linux Server (v. 6) openssl 1.0.1e-58.el6_10
    fixed: vendor fix “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.” RHSA-2019:2471
  • Red Hat Enterprise Linux Server (v. 7) openssl 1.0.2k-19.el7, openssl-libs 1.0.2k-19.el7
    fixed: vendor fix “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.” RHSA-2019:2304
  • Red Hat Enterprise Linux Server Optional (v. 6) openssl-perl 1.0.1e-58.el6_10
    fixed: vendor fix “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.” RHSA-2019:2471
show 10 more
  • Red Hat Enterprise Linux Server Optional (v. 7) openssl-perl 1.0.2k-19.el7
    fixed: vendor fix “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.” RHSA-2019:2304
  • Red Hat Enterprise Linux Workstation (v. 6) openssl 1.0.1e-58.el6_10
    fixed: vendor fix “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.” RHSA-2019:2471
  • Red Hat Enterprise Linux Workstation (v. 7) openssl 1.0.2k-19.el7, openssl-libs 1.0.2k-19.el7
    fixed: vendor fix “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.” RHSA-2019:2304
  • Red Hat Enterprise Linux Workstation Optional (v. 6) openssl-perl 1.0.1e-58.el6_10
    fixed: vendor fix “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.” RHSA-2019:2471
  • Red Hat Enterprise Linux Workstation Optional (v. 7) openssl-perl 1.0.2k-19.el7
    fixed: vendor fix “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.” RHSA-2019:2304
  • Red Hat JBoss Web Server 5
    fixed: vendor fix “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.” RHSA-2019:3931
  • Red Hat JBoss Web Server 5.2 for RHEL 6 Server jws5-ecj 4.12.0-1.redhat_1.1.el6jws, jws5-tomcat 9.0.21-10.redhat_4.1.el6jws, jws5-tomcat-lib 9.0.21-10.redhat_4.1.el6jws, jws5-javapackages-tools 3.4.1-5.15.11.el6jws, jws5-python-javapackages 3.4.1-5.15.11.el6jws, jws5-tomcat-native 1.2.21-34.redhat_34.el6jws, +13 more Red Hat JBoss Web Server 5.2 for RHEL 7 Server jws5-ecj 4.12.0-1.redhat_1.1.el7jws, jws5-tomcat 9.0.21-10.redhat_4.1.el7jws, jws5-tomcat-lib 9.0.21-10.redhat_4.1.el7jws, jws5-javapackages-tools 3.4.1-5.15.11.el7jws, jws5-python-javapackages 3.4.1-5.15.11.el7jws, jws5-tomcat-native 1.2.21-34.redhat_34.el7jws, +13 more Red Hat JBoss Web Server 5.2 for RHEL 8 jws5-ecj 4.12.0-1.redhat_1.1.el8jws, jws5-tomcat 9.0.21-10.redhat_4.1.el8jws, jws5-tomcat-lib 9.0.21-10.redhat_4.1.el8jws, jws5-javapackages-tools 3.4.1-5.15.11.el8jws, jws5-python-javapackages 3.4.1-5.15.11.el8jws, jws5-tomcat-native 1.2.21-34.redhat_34.el8jws, +13 more
    fixed: vendor fix “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.” RHSA-2019:3929
  • Red Hat Virtualization 4 Hypervisor for RHEL 7 rhvm-appliance 4.3-20190722.0.el7, redhat-virtualization-host 4.3.5-20190722.0.el7_7, redhat-virtualization-host-image-update 4.3.5-20190722.0.el7_7 Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts rhvm-appliance 4.3-20190722.0.el7
    fixed: vendor fix “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.” RHSA-2019:2439
  • Red Hat RHEL 7-based RHEV-H for RHEV 4 (build requirements) imgbased 1.1.9-0.1.el7ev, python-imgbased 1.1.9-0.1.el7ev, ovirt-node-ng 4.3.5-0.20190717.0.el7ev, ovirt-node-ng-nodectl 4.3.5-0.20190717.0.el7ev, redhat-release-virtualization-host 4.3.5-2.el7ev, python2-ovirt-node-ng-nodectl 4.3.5-0.20190717.0.el7ev, +1 more
    fixed: vendor fix “As a workaround you can disable SHA384 if applications (compiled with OpenSSL) allow for adjustment of the ciphersuite string configuration.” RHSA-2019:2437
  • Red Hat Enterprise Linux 8 openssl, openssl-libs, openssl-perl
    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

17.14% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected products

  • OpenSSL OpenSSL

Classification

Weakness
Technology feeds

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.