CVE-2018-5241

published 2018-05-29

CVE-2018-5241: 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…

Priority P2 66 critical 9.8 CVSS 3.0

AV N AC L PR N UI N S U C H I H A H

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.

Affected

10 ranges

Vendor	Product	Version range	Fixed in
broadcom	advanced_secure_gateway	—	—
broadcom	advanced_secure_gateway	—	—
broadcom	symantec_proxysg	—	—
broadcom	symantec_proxysg	—	—
broadcom	symantec_proxysg	—	—
symantec_corporation	advanced_secure_gateway	—	—
symantec_corporation	advanced_secure_gateway	—	—
symantec_corporation	proxysg	—	—
symantec_corporation	proxysg	—	—
symantec_corporation	proxysg	—	—

CVSS provenance

nvd v3.0 9.8 CRITICAL CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd v2.0 7.5 HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P

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