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» GHSA-g888-g2pp-82hf
Description
HTTPRedirect.php in the saml2 library in SimpleSAMLphp before 1.15.4 has an incorrect check of return values in the signature validation utilities, allowing an attacker to get invalid signatures accepted as valid by forcing an error during validation. This occurs because of a dependency on PHP functionality that interprets a -1 error code as a true boolean value.
Basic information
Type
reviewed
Severity
high Advisory on GitHub
Open advisory ↗ Repository advisory
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Source code
Not specified Published (advisory)
2022-05-14 03:34:12 UTC
Updated
2024-02-06 18:24:33 UTC
GitHub reviewed
2023-07-25 20:55:06 UTC
NVD published
2018-03-05
EPSS Score
Score
Percentile
0.32%
54.55%
CVSS Scores
Base score
Version
Severity
Vector
8.1
3.0
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CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
CWEs
CWE id
Name
CWE-347
Improper Verification of Cryptographic Signature
Affected packages (3)
Vulnerable version ranges and first patched releases as published by GitHub.
Ecosystem
Package
Vulnerable range
First patched
Vulnerable functions
composer
simplesamlphp/saml2 < 1.10.6
1.10.6
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composer
simplesamlphp/saml2 >= 2.0, < 2.3.8
2.3.8
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composer
simplesamlphp/saml2 >= 3.0, < 3.1.4
3.1.4
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cvelogic
Threat Intelligence