ID CVE-2018-5241
Summary Symantec Advanced Secure Gateway (ASG) 6.6 and 6.7, and ProxySG 6.5, 6.6, and 6.7 are susceptible to a SAML authentication bypass vulnerability. The products can be configured with a SAML authentication realm to authenticate network users in intercepted proxy traffic. When parsing SAML responses, ASG and ProxySG incorrectly handle XML nodes with comments. A remote attacker can modify a valid SAML response without invalidating its cryptographic signature. This may allow the attacker to bypass user authentication security controls in ASG and ProxySG. This vulnerability only affects authentication of network users in intercepted traffic. It does not affect administrator user authentication for the ASG and ProxySG management consoles.
References
Vulnerable Configurations
  • cpe:2.3:a:symantec:advanced_secure_gateway:6.6:*:*:*:*:*:*:*
    cpe:2.3:a:symantec:advanced_secure_gateway:6.6:*:*:*:*:*:*:*
  • cpe:2.3:a:symantec:advanced_secure_gateway:6.7:*:*:*:*:*:*:*
    cpe:2.3:a:symantec:advanced_secure_gateway:6.7:*:*:*:*:*:*:*
  • cpe:2.3:a:symantec:proxysg:6.5:*:*:*:*:*:*:*
    cpe:2.3:a:symantec:proxysg:6.5:*:*:*:*:*:*:*
  • cpe:2.3:a:symantec:proxysg:6.6:*:*:*:*:*:*:*
    cpe:2.3:a:symantec:proxysg:6.6:*:*:*:*:*:*:*
  • cpe:2.3:a:symantec:proxysg:6.7:*:*:*:*:*:*:*
    cpe:2.3:a:symantec:proxysg:6.7:*:*:*:*:*:*:*
CVSS
Base: 7.5 (as of 03-10-2019 - 00:03)
Impact:
Exploitability:
CWE NVD-CWE-noinfo
CAPEC
Access
VectorComplexityAuthentication
NETWORK LOW NONE
Impact
ConfidentialityIntegrityAvailability
PARTIAL PARTIAL PARTIAL
assigner via4 cve@mitre.org
cvss-vector via4 AV:N/AC:L/Au:N/C:P/I:P/A:P
non_vulnerable_configuration via4
    refmap via4
    bid 104282
    confirm https://www.symantec.com/security-center/network-protection-security-advisories/SA167
    sectrack 1040993
    vulnerable_product via4
    • cpe:2.3:a:symantec:advanced_secure_gateway:6.6:*:*:*:*:*:*:*
    • cpe:2.3:a:symantec:advanced_secure_gateway:6.7:*:*:*:*:*:*:*
    • cpe:2.3:a:symantec:proxysg:6.5:*:*:*:*:*:*:*
    • cpe:2.3:a:symantec:proxysg:6.6:*:*:*:*:*:*:*
    • cpe:2.3:a:symantec:proxysg:6.7:*:*:*:*:*:*:*
    Last major update 03-10-2019 - 00:03
    Published 29-05-2018 - 13:29
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