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Vulnerability details: VCID-pau1-u4du-skcw
Vulnerability ID VCID-pau1-u4du-skcw
Aliases CVE-2018-14642
GHSA-vf6r-mmhc-3xcm
Summary Exposure of Sensitive Information to an Unauthorized Actor in Undertow An information leak vulnerability was found in Undertow. If all headers are not written out in the first write() call then the code that handles flushing the buffer will always write out the full contents of the writevBuffer buffer, which may contain data from previous requests.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
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
cvssv3.1 5.3 https://access.redhat.com/errata/RHSA-2019:0362
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2019:0362
cvssv3.1 5.3 https://access.redhat.com/errata/RHSA-2019:0364
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2019:0364
cvssv3.1 5.3 https://access.redhat.com/errata/RHSA-2019:0365
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2019:0365
cvssv3.1 5.3 https://access.redhat.com/errata/RHSA-2019:0380
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2019:0380
cvssv3.1 5.3 https://access.redhat.com/errata/RHSA-2019:1106
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2019:1106
cvssv3.1 5.3 https://access.redhat.com/errata/RHSA-2019:1107
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2019:1107
cvssv3.1 5.3 https://access.redhat.com/errata/RHSA-2019:1108
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2019:1108
cvssv3.1 5.3 https://access.redhat.com/errata/RHSA-2019:1140
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2019:1140
cvssv3 5.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-14642.json
epss 0.00746 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00746 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00746 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00746 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00746 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00746 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00746 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00746 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00776 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00776 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00776 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00776 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00776 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00776 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00776 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00776 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00776 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00776 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00776 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00776 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00776 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00776 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00776 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
epss 0.00776 https://api.first.org/data/v1/epss?cve=CVE-2018-14642
cvssv3.1 5.3 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14642
generic_textual MODERATE https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14642
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-vf6r-mmhc-3xcm
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2018-14642
cvssv3.1 5.3 https://nvd.nist.gov/vuln/detail/CVE-2018-14642
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2018-14642
Reference id Reference type URL
https://access.redhat.com/errata/RHSA-2019:0362
https://access.redhat.com/errata/RHSA-2019:0364
https://access.redhat.com/errata/RHSA-2019:0365
https://access.redhat.com/errata/RHSA-2019:0380
https://access.redhat.com/errata/RHSA-2019:1106
https://access.redhat.com/errata/RHSA-2019:1107
https://access.redhat.com/errata/RHSA-2019:1108
https://access.redhat.com/errata/RHSA-2019:1140
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-14642.json
https://api.first.org/data/v1/epss?cve=CVE-2018-14642
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14642
https://nvd.nist.gov/vuln/detail/CVE-2018-14642
1628702 https://bugzilla.redhat.com/show_bug.cgi?id=1628702
911796 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=911796
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:-:*:*:*:*:*:*:*
GHSA-vf6r-mmhc-3xcm https://github.com/advisories/GHSA-vf6r-mmhc-3xcm
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://access.redhat.com/errata/RHSA-2019:0362
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://access.redhat.com/errata/RHSA-2019:0364
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://access.redhat.com/errata/RHSA-2019:0365
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://access.redhat.com/errata/RHSA-2019:0380
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://access.redhat.com/errata/RHSA-2019:1106
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://access.redhat.com/errata/RHSA-2019:1107
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://access.redhat.com/errata/RHSA-2019:1108
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://access.redhat.com/errata/RHSA-2019:1140
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:H/PR:L/UI:N/S:U/C:H/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-14642.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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14642
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:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-14642
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-14642
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 0.72162
EPSS Score 0.00746
Published At Sept. 9, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T09:14:36.350211+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-vf6r-mmhc-3xcm/GHSA-vf6r-mmhc-3xcm.json 37.0.0