CVE-2017-1000433
pysaml2 Improper Authentication vulnerability
CVE-2017-1000433 is a high vulnerability (CVSS 8.1) in Pysaml2 Project Pysaml2, published January 2, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.54%, the 84th percentile. Fixed in pysaml2 4.5.0.
pysaml2 version 4.4.0 and older accept any password when run with python optimizations enabled. This allows attackers to log in as any user without knowing their password.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
8.1
pysaml2 version 4.4.0 and older accept any password when run with python optimizations enabled. This allows attackers to log in as any user without knowing their password.
- Record
CVE-2017-1000433- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE List No score
pysaml2 version 4.4.0 and older accept any password when run with python optimizations enabled. This allows attackers to log in as any user without knowing their password.
- Record
CVE-2017-1000433- Updated
- 2026-11-02
EUVDEUVD-2018-0126 No score
pysaml2 version 4.4.0 and older accept any password when run with python optimizations enabled. This allows attackers to log in as any user without knowing their password.
- Record
EUVD-2018-0126- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-924m-4pmx-c67h
9.2
pysaml2 Improper Authentication vulnerability
pysaml2 version 4.4.0 and older accept any password when run with python optimizations enabled. This allows attackers to log in as any user without knowing their password.
- Record
GHSA-924m-4pmx-c67h- CVSS 4.0
- 9.2 Critical
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
OSV
8.1
pysaml2 version 4.4.0 and older accept any password when run with python optimizations enabled. This allows attackers to log in as any user without knowing their password.
- Record
CVE-2017-1000433- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2017-1000433
8.1
pysaml2 version 4.4.0 and older accept any password when run with python optimizations enabled. This allows attackers to log in as any user without knowing their password.
- Record
DEBIAN-CVE-2017-1000433- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Show 6 moreShow less
OSVGHSA-924m-4pmx-c67h
9.2
pysaml2 Improper Authentication vulnerability
pysaml2 version 4.4.0 and older accept any password when run with python optimizations enabled. This allows attackers to log in as any user without knowing their password.
- Record
GHSA-924m-4pmx-c67h- CVSS 4.0
- 9.2 Critical
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2017-1000433
8.1
pysaml2 version 4.4.0 and older accept any password when run with python optimizations enabled. This allows attackers to log in as any user without knowing their password.
- Record
UBUNTU-CVE-2017-1000433- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVPYSEC-2018-48 No score
pysaml2 version 4.4.0 and older accept any password when run with python optimizations enabled. This allows attackers to log in as any user without knowing their password.
- Record
PYSEC-2018-48- Updated
- 2026-11-02
OSVSUSE-SU-2018:1194-1 No score
Security update for python-pysaml2
This update for python-pysaml2 fixes the following issues:
- CVE-2017-1000433: When python optimizations are enabled, any user is able to login without knowing their password. (bsc#1074662)
- Record
SUSE-SU-2018:1194-1- Updated
- 2026-11-02
OSVSUSE-SU-2019:1450-1 No score
Security update for Cloud7 packages
This update provides fixes for the following packages issues:
caasp-openstack-heat-templates:
- Update to version 1.0+git.1553079189.3bf8922:
- SCRD-2813 Add support for CPI parameters
- Update to version 1.0+git.1547562889.43707e7:
- Switch LB protocol from HTTP to HTTPS
crowbar:
- Update to version 4.0+git.1551088848.823bcaa3:
- install-chef-suse: filter comments from authorized_keys file
crowbar-core:
- Update to version 4.0+git.1556285635.ab602dd4d:
- network: run wicked ifdown for interface cleanup (bsc#1063535)
- Update to version 4.0+git.1554931881.d98412e0e:
- Fix cloud-mkcloud9-job-backup-restore (SCRD-7126)
- Update to version 4.0+git.1552239940.5bc9aaac4:
- crowbar: Do not rely on Chef::Util::FileEdit to write the file (bsc#1127752)
- Update to version 4.0+git.1550493400.9787ea9ad:
- upgrade: Delay status switch after upgrade ends
- Update to version 4.0+git.1549474445.d9a35cf52:
- fix hound warning
- Support RAID 0
- Packaged default upgrade timeouts file
- Update to version 4.0+git.1549136953.afcde921f:
- apache2: enable sslsessioncache
- Update to version 4.0+git.1548859099.0edbbfdc2:
- upgrade: Add default upgrade timeouts file
crowbar-ha:
- Update to version 4.0+git.1556181005.47c643d:
- pacemaker: wait more for founder if SBD is configured (SCRD-8462)
- pacemaker: don't check cluster members on founder (SCRD-8462)
- Update to version 4.0+git.1554215159.8a42a71:
- improve galera HA setup (bsc#1122875)
crowbar-openstack:
- Update to version 4.0+git.1554887450.ff7c30c1c:
- neutron: Added option to use L3 HA with Keepalived
- Update to version 4.0+git.1554843756.5622551da:
- ironic: Fix regression in helper
- Update to version 4.0+git.1554814630.ec3c89f25:
- ceilometer: Install package which contains cron file (bsc#1130414)
- Update to version 4.0+git.1551459192.89433e13b:
- rabbit: fix mirroring regex
- Update to version 4.0+git.1550582615.f6b433ec7:
- ceilometer: Use pacemaker to handle expirer cron link (bsc#1113107)
- Update to version 4.0+git.1550262335.9667fa580:
- mysql: Do not set a custom logfile for mysqld (bsc#1112767)
- mysql: create .my.cnf in root home directory for mysql cmdline
- Update to version 4.0+git.1549986893.df836d6cc:
- mariadb: Remove installing the xtrabackup package
- ssl: Fix ACL setup in ssl_setup provider (bsc#1123709)
galera-python-clustercheck:
- readtimeout.patch: Add socket read timeout (bsc#1122053)
openstack-ceilometer:
- Install openstack-ceilometer-expirer.cron into /usr/share/ceilometer This is needed in a clustered environment where multiple ceilometer-collector services are installed on different nodes (and due to that multiple expirer cron jobs installed). That can lead to deadlocks when the cron jobs run in parallel on the different nodes (bsc#1113107)
openstack-heat-gbp:
- switch to newton branch
python-PyKMIP:
- Fix a denial-of-service bug by setting the server socket timeout (bsc#1120767 CVE-2018-1000872)
python-pysaml2:
- Fix for the authentication bypass due to optimizations (CVE-2017-1000433, bsc#1074662)
rubygem-crowbar-client:
- Update to 3.9.0
- Add support for the restricted APIs
- Add --raw to 'proposal show' and 'proposal edit'
- Correctly parse error messages that we don't handle natively
- Better upgrade repocheck output
- Update to 3.7.0
- upgrade: Use cloud_version config for upgrade
- ses: Add ses upload subcommand
- Add cloud_version config field.
- Wrap os-release file parsing for better reuse.
- upgrade: Fix repocheck component in error message
- upgrade: Better repocheck output
- updated to version 3.6.1
- Hide the database step when it is not used (bsc#1118004)
- Fix help strings
- Describe how to upgrade more nodes with one command
- Record
SUSE-SU-2019:1450-1- Updated
- 2026-11-02
OSVUSN-3520-1 No score
python-pysaml2 vulnerability
It was discovered that PySAML2 incorrectly accepted any password when run with python optimizations enabled. An attacker could use this issue to authenticate as any user without a valid password.
- Record
USN-3520-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
pysaml2PyPI |
before 4.5.0 | 4.5.0 |
python-pysaml2Debian:12 |
before 4.5.0-2 | 4.5.0-2 |
python-pysaml2Debian:13 |
before 4.5.0-2 | 4.5.0-2 |
python-pysaml2Debian:14 |
before 4.5.0-2 | 4.5.0-2 |
python-pysaml2Debian:8 |
before 2.0.0-1+deb8u2, plus listed versions 2.0.0-12.0.0-1+deb8u1 |
2.0.0-1+deb8u2 |
python-pysaml2Debian:9 |
before 3.0.0-5+deb9u2, plus listed versions 3.0.0-53.0.0-5+deb9u1 |
3.0.0-5+deb9u2 |
pysaml2PyPI |
before 4.5.0, plus listed versions 0.4.31.0.11.0.21.0.31.1.0 Show 18 moreShow less2.0.02.1.02.2.02.3.02.4.03.0.03.0.24.0.04.0.14.0.24.0.34.0.44.0.54.0.5rc14.1.04.2.04.3.04.4.0 |
4.5.0 |
python-pysaml2SUSE:OpenStack Cloud 7 |
before 4.0.2-3.3.2 | 4.0.2-3.3.2 |
caasp-openstack-heat-templatesSUSE:OpenStack Cloud 7 |
before 1.0+git.1553079189.3bf8922-1.6.2 | 1.0+git.1553079189.3bf8922-1.6.2 |
crowbarSUSE:OpenStack Cloud 7 |
before 4.0+git.1551088848.823bcaa3-7.29.2 | 4.0+git.1551088848.823bcaa3-7.29.2 |
Show 14 moreShow less
| Package | Affected | Fixed |
|---|---|---|
crowbar-coreSUSE:OpenStack Cloud 7 |
before 4.0+git.1556285635.ab602dd4d-9.46.3 | 4.0+git.1556285635.ab602dd4d-9.46.3 |
crowbar-haSUSE:OpenStack Cloud 7 |
before 4.0+git.1556181005.47c643d-4.46.3 | 4.0+git.1556181005.47c643d-4.46.3 |
crowbar-openstackSUSE:OpenStack Cloud 7 |
before 4.0+git.1554887450.ff7c30c1c-9.51.3 | 4.0+git.1554887450.ff7c30c1c-9.51.3 |
galera-python-clustercheckSUSE:OpenStack Cloud 7 |
before 0.0+git.1506329536.8f5878c-1.6.2 | 0.0+git.1506329536.8f5878c-1.6.2 |
openstack-ceilometerSUSE:OpenStack Cloud 7 |
before 7.1.1~dev4-4.15.3 | 7.1.1~dev4-4.15.3 |
openstack-ceilometer-docSUSE:OpenStack Cloud 7 |
before 7.1.1~dev4-4.15.3 | 7.1.1~dev4-4.15.3 |
openstack-heat-gbpSUSE:OpenStack Cloud 7 |
before 5.1.1~dev1-2.6.3 | 5.1.1~dev1-2.6.3 |
python-PyKMIPSUSE:OpenStack Cloud 7 |
before 0.5.0-3.3.3 | 0.5.0-3.3.3 |
python-pysaml2SUSE:OpenStack Cloud 7 |
before 4.0.2-3.6.3 | 4.0.2-3.6.3 |
rubygem-crowbar-clientSUSE:OpenStack Cloud 7 |
before 3.9.0-7.14.2 | 3.9.0-7.14.2 |
crowbarSUSE:Enterprise Storage 4 |
before 4.0+git.1551088848.823bcaa3-7.29.2 | 4.0+git.1551088848.823bcaa3-7.29.2 |
crowbar-coreSUSE:Enterprise Storage 4 |
before 4.0+git.1556285635.ab602dd4d-9.46.3 | 4.0+git.1556285635.ab602dd4d-9.46.3 |
rubygem-crowbar-clientSUSE:Enterprise Storage 4 |
before 3.9.0-7.14.2 | 3.9.0-7.14.2 |
python-pysaml2Ubuntu:16.04:LTS |
before 3.0.0-3ubuntu1.16.04.3, plus listed versions 2.4.0-0ubuntu23.0.0-3ubuntu13.0.0-3ubuntu1.16.04.1 |
3.0.0-3ubuntu1.16.04.3 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |
References
lists.debian.org/debian-lts-announce/2018/07/msg00000.html
github.com/rohe/pysaml2/issues/451
security.gentoo.org/glsa/201801-11
lists.debian.org/debian-lts-announce/2021/02/msg00038.html
nvd.nist.gov/vuln/detail/CVE-2017-1000433
github.com/IdentityPython/pysaml2/pull/454
Show 30 moreShow less
github.com/IdentityPython/pysaml2/commit/6312a41e037954850867f29d329e5007df1424a5
github.com/advisories/GHSA-924m-4pmx-c67h
github.com/pypa/advisory-database/tree/main/vulns/pysaml2/PYSEC-2018-48.yaml
security-tracker.debian.org/tracker/CVE-2017-1000433
github.com/rohe/pysaml2
suse.com/support/update/announcement/2018/suse-su-20181194-1
bugzilla.suse.com/1074662
suse.com/security/cve/CVE-2017-1000433
suse.com/support/update/announcement/2019/suse-su-20191450-1
bugzilla.suse.com/1063535
bugzilla.suse.com/1112767
bugzilla.suse.com/1113107
bugzilla.suse.com/1118004
bugzilla.suse.com/1120767
bugzilla.suse.com/1122053
bugzilla.suse.com/1122875
bugzilla.suse.com/1123709
bugzilla.suse.com/1127558
bugzilla.suse.com/1127752
bugzilla.suse.com/1128954
bugzilla.suse.com/1128987
bugzilla.suse.com/1130414
bugzilla.suse.com/1131053
suse.com/security/cve/CVE-2018-1000872
bugzilla.suse.com/SCRD-2813
bugzilla.suse.com/SCRD-7126
bugzilla.suse.com/SCRD-8462
ubuntu.com/security/CVE-2017-1000433
ubuntu.com/security/notices/USN-3520-1
cve.org/CVERecord?id=CVE-2017-1000433