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Vulnerability details: VCID-7uu6-4fm7-k7bj
Vulnerability ID VCID-7uu6-4fm7-k7bj
Aliases CVE-2017-2670
GHSA-3x7h-5hfr-hvjm
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2017-2670.json
epss 0.05972 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.05972 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.05972 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
epss 0.07915 https://api.first.org/data/v1/epss?cve=CVE-2017-2670
cvssv3.1 7.5 https://github.com/advisories/GHSA-3x7h-5hfr-hvjm
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-3x7h-5hfr-hvjm
generic_textual MODERATE https://github.com/advisories/GHSA-3x7h-5hfr-hvjm
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2017-2670
cvssv3 7.5 https://nvd.nist.gov/vuln/detail/CVE-2017-2670
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2017-2670
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2017-2670
Reference id Reference type URL
http://rhn.redhat.com/errata/RHSA-2017-1409.html
https://access.redhat.com/errata/RHSA-2017:1410
https://access.redhat.com/errata/RHSA-2017:1411
https://access.redhat.com/errata/RHSA-2017:1412
https://access.redhat.com/errata/RHSA-2017:3454
https://access.redhat.com/errata/RHSA-2017:3455
https://access.redhat.com/errata/RHSA-2017:3456
https://access.redhat.com/errata/RHSA-2017:3458
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2017-2670.json
https://api.first.org/data/v1/epss?cve=CVE-2017-2670
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2670
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-2666
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-2670
https://github.com/advisories/GHSA-3x7h-5hfr-hvjm
https://github.com/undertow-io/undertow/commit/9bfe9fbbb595d51157b61693f072895f7dbadd1d
https://nvd.nist.gov/vuln/detail/CVE-2017-2670
https://www.debian.org/security/2017/dsa-3906
http://www.securityfocus.com/bid/98965
1438885 https://bugzilla.redhat.com/show_bug.cgi?id=1438885
864405 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=864405
cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
RHSA-2017:1409 https://access.redhat.com/errata/RHSA-2017:1409
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2017-2670.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/advisories/GHSA-3x7h-5hfr-hvjm
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2017-2670
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2017-2670
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2017-2670
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.90311
EPSS Score 0.05972
Published At Sept. 21, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T07:58:48.673660+00:00 ProjectKB MSRImporter Import https://raw.githubusercontent.com/SAP/project-kb/master/MSR2019/dataset/vulas_db_msr2019_release.csv 37.0.0