CVE-2017-7670 json
Apache Traffic Control vulnerable to Slowloris-style Denial of Service attack
published 2017-07-10 9 y ago modified 2026-06-17 4 mo ago also GHSA-f2wr-c4c4-xjg7 , EUVD-2022-3672
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 4.7%
- EPSS 4.7% chance of exploitation in 30 days, percentile 91%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/apache/trafficcontrol 0.0.0-20170531185407-738c10fa1b58, 1.1.4-0.20170531185407-738c10fa1b58, 1.8.1, 2.0.0, 2.1.0-RC1
- github.com/apache/trafficcontrol@738c10f commit
- github.com/apache/trafficcontrol#633 pull request
- github.com/apache/trafficcontrol#634 pull request
Exploit prediction
4.67% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| GitHub | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/apache/trafficcontrol | >=1.1.4, <1.8.1 >=2.0.0-RC0, <2.0.0 >=2.1.0-RC0, <2.1.0-RC1 <0.0.0-20170531185407-738c10fa1b58 >=0.0.0, <1.1.4-0.20170531185407-738c10fa1b58 |
1.8.1 2.0.0 2.1.0-RC1 0.0.0-20170531185407-738c10fa1b58 1.1.4-0.20170531185407-738c10fa1b58 |
Affected products
- Apache Software Foundation Apache Traffic Control
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
-
github.com
/apache/trafficcontrol/pull/633
web
-
github.com
/apache/trafficcontrol/pull/634
web
-
github.com
/apache/trafficcontrol/commit/738c10fa1b5861e4cc3944dc7c3065d16f4a708c
web
-
lists.apache.org
/thread.html/42b207e9f526353b504591684bd02a5e9fcb4b8f28534253d07740a0%40%3Cusers.trafficcontrol.apache.org%3E
mailing-list
-
lists.apache.org
/thread.html/bb09fc29e9c2ee85b118a3d5748a8a523d30cf691ff8b606c6a1748c%40%3Ccommits.trafficcontrol.apache.org%3
mailing-list
-
lists.apache.org
/thread.html/r3c675031ac220b5eae64a9c84a03ee60045c6045738607dca4a96cb8%40%3Ccommits.trafficcontrol.apache.org%
mailing-list
-
nvd.nist.gov
/vuln/detail/CVE-2017-7670
advisory
-
github.com
/apache/trafficcontrol
package
-
lists.apache.org
/thread.html/42b207e9f526353b504591684bd02a5e9fcb4b8f28534253d07740a0@%3Cusers.trafficcontrol.apache.org%3E
web
-
lists.apache.org
/thread.html/bb09fc29e9c2ee85b118a3d5748a8a523d30cf691ff8b606c6a1748c@%3Ccommits.trafficcontrol.apache.org%3E
web
-
lists.apache.org
/thread.html/r3c675031ac220b5eae64a9c84a03ee60045c6045738607dca4a96cb8@%3Ccommits.trafficcontrol.apache.org%3E
web
Sources
- CVE List CVE-2017-7670
- GitHub Advisory GHSA-f2wr-c4c4-xjg7
- NVD CVE-2017-7670
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.