XXE in IBM External Authentication Server
CVE-2020-4462
IBM Sterling External Authentication Server 6.0.1, 6.0.0, 2.4.3.2, and 2.4.2 and IBM Sterling Secure Proxy 6.0.1, 6.0.0, 3.4.3, and 3.4.2 are vulnerable to an XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources. IBM X-Force ID: 181482.
Vulnerability class: XXE (XML External Entity)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L.
EPSS exploit prediction
EPSS: 0.032 (87.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: 0.000
Affected products
- IBM External Authentication Server — versions 6.0, 6.0.1
- IBM Sterling External Authentication Server — versions 2.4.2, 2.4.3.2
- IBM Sterling External Authentication Server — versions 2.4.2.0, 2.4.3.2, 6.0.0.0
- IBM Sterling Secure Proxy — versions 3.4.2, 3.4.3, 2.4.3
- IBM Sterling Secure Proxy — versions 3.4.2.0, 3.4.3.0, 6.0.0.0
Weakness classification (CWE)
References
- www.ibm.com/support/pages/node/6249331 (Vendor Advisory)
- www.ibm.com/support/pages/node/6249317 (Vendor Advisory)
- exchange.xforce.ibmcloud.com/vulnerabilities/181482 (VDB Entry, vdb-entry, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-4462?
- CVE-2020-4462 is a high-severity vulnerability in IBM External Authentication Server, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 8.2/10. Published 2020-07-16.
- How severe is CVE-2020-4462?
- High severity. CVSS v3 base score is 8.2 out of 10.