CVE-2020-5390 describes an XML Signature Wrapping (XSW) vulnerability in PySAML2 versions prior to 5.0.0, affecting products like Canonical and Debian Linux distributions that utilize PySAML2. This flaw allows an attacker to manipulate SAML assertions by separating the signature from the signed data, leading to successful signature verification of incorrect information. With a CVSS score of 7.5 (HIGH), this vulnerability is remotely exploitable with low attack complexity, potentially leading to high integrity impacts without requiring user interaction. While no public exploits, Metasploit modules, or Nuclei templates are currently available, and there is minimal community discussion, organizations using affected PySAML2 versions should prioritize patching.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 5.0.0CPE matchmatch criteria | cpe:2.3:a:pysaml2_project:pysaml2:*:*:*:*:*:*:*:* | ||
16.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* | ||
18.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | ||
19.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:* | ||
19.10CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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