Vulnerability in Broadcom Advanced Secure Gateway
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 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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.046 (91.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.046 · newest: 0.046 · change: 0.000
Affected products
- Broadcom Advanced Secure Gateway — versions 6.6, 6.7
- Broadcom Symantec Proxysg — versions 6.5, 6.6, 6.7
- Symantec Corporation Advanced Secure Gateway (Asg) — versions 6.6, 6.7
- Symantec Corporation Proxysg — versions 6.5, 6.6, 6.7
References
- www.symantec.com/security-center/network-protection-security-advisories/SA167 (Vendor Advisory)
- www.securitytracker.com/id/1040993 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securityfocus.com/bid/104282 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2018-5241?
- CVE-2018-5241 is a critical-severity vulnerability in Broadcom Advanced Secure Gateway. CVSS score: 9.8/10. Published 2018-05-29.
- How severe is CVE-2018-5241?
- Critical severity. CVSS v3 base score is 9.8 out of 10.