CVE-2017-7670

The Traffic Router component of the incubating Apache Traffic Control project is vulnerable to a Slowloris style Denial of Service attack. TCP connections made on the configured DNS port will remain in the ESTABLISHED state until the client explicitly closes the connection or Traffic Router is restarted. If connections remain in the ESTABLISHED state indefinitely and accumulate in number to match the size of the thread pool dedicated to processing DNS requests, the thread pool becomes exhausted. Once the thread pool is exhausted, Traffic Router is unable to service any DNS request, regardless of transport protocol.

Published: 2017-07-10 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-7670 is rated Moderate Risk (64.8/100): CVSS High severity, with high exploitation likelihood (EPSS 4.80%, 91th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +3.07% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2017-7670

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.73% 4.80% +3.07%
2 2025-12-05 1.28% 1.73% +0.45%
3 2025-11-21 — 1.28% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-7670

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2017-7670

GitHub Security Advisory for CVE-2017-7670

GHSA-f2wr-c4c4-xjg7 · Severity: high · Ecosystem: go — Apache Traffic Control vulnerable to Slowloris-style Denial of Service attack

Affected software / configurations for CVE-2017-7670

Vendor Product Version Raw CPE
apache traffic_control <= 1.8.0 cpe:2.3:a:apache:traffic_control:*:*:*:*:*:*:*:*
apache traffic_control 1.8.1 cpe:2.3:a:apache:traffic_control:1.8.1:rc0:*:*:*:*:*:*
apache traffic_control 2.0.0 cpe:2.3:a:apache:traffic_control:2.0.0:rc1:*:*:*:*:*:*
apache traffic_control 2.0.0 cpe:2.3:a:apache:traffic_control:2.0.0:rc2:*:*:*:*:*:*
apache traffic_control 2.0.0 cpe:2.3:a:apache:traffic_control:2.0.0:rc3:*:*:*:*:*:*
apache traffic_control 2.0.0 cpe:2.3:a:apache:traffic_control:2.0.0:rc4:*:*:*:*:*:*
apache traffic_control 2.0.0 cpe:2.3:a:apache:traffic_control:2.0.0:rc5:*:*:*:*:*:*
apache traffic_control 2.0.0 cpe:2.3:a:apache:traffic_control:2.0.0:rc6:*:*:*:*:*:*

References for CVE-2017-7670

cvelogic Threat Intelligence