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Debian DLA-2577-1 : python-pysaml2 security update
high Nessus Plugin ID 146893
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Synopsis
The remote Debian host is missing a security update.Description
Several issues have been found in python-pysaml2, a pure python implementation of SAML Version 2 Standard.CVE-2017-1000433
pysaml2 accept any password when run with python optimizations enabled. This allows attackers to log in as any user without knowing their password.
CVE-2021-21239
pysaml2 has an improper verification of cryptographic signature vulnerability. Users of pysaml2 that use the default CryptoBackendXmlSec1 backend and need to verify signed SAML documents are impacted. PySAML2 does not ensure that a signed SAML document is correctly signed. The default CryptoBackendXmlSec1 backend is using the xmlsec1 binary to verify the signature of signed SAML documents, but by default xmlsec1 accepts any type of key found within the given document. xmlsec1 needs to be configured explicitly to only use only
_x509 certificates_ for the verification process of the SAML document signature.
For Debian 9 stretch, these problems have been fixed in version 3.0.0-5+deb9u2.
We recommend that you upgrade your python-pysaml2 packages.
For the detailed security status of python-pysaml2 please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/python-pysaml2
NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
Solution
Upgrade the affected packages.See Also
https://lists.debian.org/debian-lts-announce/2021/02/msg00038.html
Plugin Details
Severity: High
ID: 146893
File Name: debian_DLA-2577.nasl
Version: 1.3
Type: local
Agent: unix
Family: Debian Local Security Checks
Published: 3/1/2021
Updated: 1/18/2024
Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.9
CVSS v2
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 5.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2017-1000433
CVSS v3
Risk Factor: High
Base Score: 8.1
Temporal Score: 7.3
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:debian:debian_linux:python-pysaml2, p-cpe:/a:debian:debian_linux:python-pysaml2-doc, p-cpe:/a:debian:debian_linux:python3-pysaml2, cpe:/o:debian:debian_linux:9.0
Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 2/26/2021
Vulnerability Publication Date: 1/2/2018