SB2018022712 - XXE attack in SAML libraries

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Main Vulnerability Database SB2018022712

SB2018022712 - XXE attack in SAML libraries

Published: February 27, 2018

Security Bulletin ID SB2018022712
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) XXE attack (CVE-ID: CVE-2017-11430)

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to perform XXE attack.

The vulnerability exists due to an implementation flaw in the SAML open-source library. A remote attacker can add or modify specially crafted XML data, modify digital signatures of user attribute data and impersonate a user or obtain potentially sensitive information.

2) XXE attack (CVE-ID: CVE-2017-11429)

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote authenticated attacker to perform XXE attack.

The vulnerability exists due to an implementation flaw in the saml2-js open-source library. A remote attacker can add or modify specially crafted XML data, modify digital signatures of user attribute data and impersonate a user or obtain potentially sensitive information.

3) XXE attack (CVE-ID: CVE-2017-11428)

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote authenticated attacker to perform XXE attack.

The vulnerability exists due to an implementation flaw in the ruby-saml open-source library. A remote attacker can add or modify specially crafted XML data, modify digital signatures of user attribute data and impersonate a user or obtain potentially sensitive information.

4) XXE attack (CVE-ID: CVE-2017-11427)

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote authenticated attacker to perform XXE attack.

The vulnerability exists due to an implementation flaw in the python-saml open-source library. A remote attacker can add or modify specially crafted XML data, modify digital signatures of user attribute data and impersonate a user or obtain potentially sensitive information.

Remediation

Install update from vendor's website.

References