CVE-2020-5390
python-pysaml2 - security update
7.5
HIGH
CVSS 3.1
EPSS 0.76%
Description
PySAML2 before 5.0.0 does not check that the signature in a SAML document is enveloped and thus signature wrapping is effective, i.e., it is affected by XML Signature Wrapping (XSW). The signature information and the node/object that is signed can be in different places and thus the signature verification will succeed, but the wrong data will be used. This specifically affects the verification of assertion that have been signed.
How to fix CVE-2020-5390
To remediate CVE-2020-5390, upgrade the affected package to a fixed version below.
- —upgrade to 4.5.0-7 or later
- —upgrade to 2.0.0-1+deb8u3 or later
- —upgrade to 3.0.0-5+deb9u1 or later
- —upgrade to 5.0.0 or later
- —upgrade to f27c7e7a7010f83380566a219fd6a290a00f2b6e or later
Is CVE-2020-5390 being exploited?
Low — EPSS is 0.8%, meaning exploitation activity has not been observed at scale.
Affected packages (5)
- from 0, < 4.5.0-7
- from 0, < 2.0.0-1+deb8u3
- from 0, < 3.0.0-5+deb9u1
- from 0, < 5.0.0
- from 0, < f27c7e7a7010f83380566a219fd6a290a00f2b6e, < 5e9d5acbcd8ae45c4e736ac521fd2df5b1c62e25 | from 0, < 5.0.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |