CVE-2017-3156

Cxf vulnerability

CVSS

7.5

EPSS

6.3%

EPSS pct

93th

Exploited

No known

The OAuth2 Hawk and JOSE MAC Validation code in Apache CXF prior to 3.0.13 and 3.1.x prior to 3.1.10 is not using a constant time MAC signature comparison algorithm which may be exploited by sophisticated timing attacks.

Affected vendor

Apache

Affected product

Cxf

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Published

2017-08-10

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality.

Its EPSS score of 6.3% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 93% of all scored CVEs.

Check your external exposure to CVE-2017-3156

Confirm whether Apache Cxf is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2017-3156.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2017-3156

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2017-3156 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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