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github.com/russellhaering/gosaml2 is vulnerable to NULL Pointer Dereference

High severity GitHub Reviewed Published Nov 10, 2022 in russellhaering/gosaml2 • Updated May 20, 2024

Package

gomod github.com/russellhaering/gosaml2 (Go)

Affected versions

< 0.7.0

Patched versions

0.7.0
gomod github.com/russellhaering/goxmldsig (Go)
< 1.1.1
1.1.1

Description

Impact

In versions prior to v0.7.0 it was possible for an attacker to supply an invalid assertion which would trigger a panic due to a nil-pointer dereference.

Patches

The issue was patched in v0.7.0, released on March 2, 2022.

Workarounds

Callers to gosaml2 can use recover() to handle panics to mitigate a potential DoS.

References

See issue #59 for details.

References

@russellhaering russellhaering published to russellhaering/gosaml2 Nov 10, 2022
Published to the GitHub Advisory Database Nov 15, 2022
Reviewed Nov 15, 2022
Last updated May 20, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.147%
(51st percentile)

Weaknesses

CVE ID

CVE-2020-7731

GHSA ID

GHSA-prjq-f4q3-fvfr

Source code

Credits

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