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Bug 1542244 (CVE-2018-6519) - CVE-2018-6519 php-simplesamlphp-saml2: Denial of Service in xs:DateTime timestamp in SAML2 library
Summary: CVE-2018-6519 php-simplesamlphp-saml2: Denial of Service in xs:DateTime times...
Alias: CVE-2018-6519
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1542245 1542246
TreeView+ depends on / blocked
Reported: 2018-02-05 22:07 UTC by Laura Pardo
Modified: 2019-09-29 14:31 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
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Clone Of:
Last Closed: 2019-02-25 15:07:21 UTC

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Description Laura Pardo 2018-02-05 22:07:01 UTC
The SAML2 library before 1.10.4, 2.x before 2.3.5, and 3.x before 3.1.1 in SimpleSAMLphp has a Regular Expression Denial of Service vulnerability for fraction-of-seconds data in a timestamp. When parsing a timestamp contained inside a SAML document, the SAML2 library uses a regular expression to validate its format and parse its components. The given regular expression sets no limits for the fraction of seconds part, such that an arbitrary amount of digits can be processed. This opens up the possibility to perform a denial of service attack by sending a large number of digits as the fraction of a second in a timestamp, making the processing script choke while evaluating the regular expression.


Comment 1 Laura Pardo 2018-02-05 22:07:47 UTC
Created php-simplesamlphp-saml2 tracking bugs for this issue:

Affects: epel-all [bug 1542245]
Affects: fedora-all [bug 1542246]

Comment 2 Shawn Iwinski 2019-02-23 07:32:15 UTC
All dependent bugs have been closed.  Can this bug be closed as well?

Comment 3 Laura Pardo 2019-02-25 15:07:21 UTC
In reply to comment #2:
> All dependent bugs have been closed.  Can this bug be closed as well?

Yes. Closing

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