CVE-2017-2670
It was found in Undertow before 1.3.28 that with non-clean TCP close, the Websocket server gets into infinite loop on every IO thread, effectively causing DoS.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.62%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
It was found in Undertow before 1.3.28 that with non-clean TCP close, the Websocket server gets into infinite loop on every IO thread, effectively causing DoS.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 3.62% probability · 89th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-835
- Affected
- redhat/undertow · debian/debian linux · redhat/jboss enterprise application platform
- Source
- secalert@redhat.com
EPSS 3.6% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://rhn.redhat.com/errata/RHSA-2017-1409.htmlVendor Advisory
- http://www.securityfocus.com/bid/98965Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:1410Vendor Advisory
- https://access.redhat.com/errata/RHSA-2017:1411Vendor Advisory
- https://access.redhat.com/errata/RHSA-2017:1412Vendor Advisory
- https://access.redhat.com/errata/RHSA-2017:3454Vendor Advisory
- https://access.redhat.com/errata/RHSA-2017:3455Vendor Advisory
- https://access.redhat.com/errata/RHSA-2017:3456Vendor Advisory
- https://access.redhat.com/errata/RHSA-2017:3458Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2670Issue Tracking, Vendor Advisory
- https://www.debian.org/security/2017/dsa-3906Third Party Advisory
- http://rhn.redhat.com/errata/RHSA-2017-1409.htmlVendor Advisory
- http://www.securityfocus.com/bid/98965Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:1410Vendor Advisory
- https://access.redhat.com/errata/RHSA-2017:1411Vendor Advisory
- https://access.redhat.com/errata/RHSA-2017:1412Vendor Advisory
- https://access.redhat.com/errata/RHSA-2017:3454Vendor Advisory
- https://access.redhat.com/errata/RHSA-2017:3455Vendor Advisory
- https://access.redhat.com/errata/RHSA-2017:3456Vendor Advisory
- https://access.redhat.com/errata/RHSA-2017:3458Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2670Issue Tracking, Vendor Advisory
- https://www.debian.org/security/2017/dsa-3906Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.