CVE-2018-5241: broadcom advanced_secure_gateway
Vulnerability summary
CVE-2018-5241 is a critical (CVSS 9.8) vulnerability in broadcom advanced_secure_gateway. EPSS estimates a 4.52% chance of exploitation in the next 30 days, higher than 91.4% of scored vulnerabilities.
Timeline
- 29-05-2018PublishedVulnerability first disclosed.
- 17-09-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
4.52%
Chance of exploitation in the next 30 days
Percentile
91%
Versus all other CVEs
30-day change
-0.09 pp
From 4.62% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Broadcom2 products
- advanced_secure_gateway6.6 | 6.7
- symantec_proxysg6.5 | 6.6 | 6.7
Symantec corporation2 products
- advanced secure gateway (asg)6.6 | 6.7
- proxysg6.5 | 6.6 | 6.7
2 vendors · 4 products
References
3 links- www.symantec.com/security-center/network-protection-security-advisories/SA167X Refsource CONFIRMVendor Advisory