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Vulnerability details: VCID-c9nm-3ngj-ffch
Vulnerability ID VCID-c9nm-3ngj-ffch
Aliases CVE-2018-1000168
Summary nghttp2 version >= 1.10.0 and nghttp2 <= v1.31.0 contains an Improper Input Validation CWE-20 vulnerability in ALTSVC frame handling that can result in segmentation fault leading to denial of service. This attack appears to be exploitable via network client. This vulnerability appears to have been fixed in >= 1.31.1.
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-20 Improper Input Validation
CWE-476 NULL Pointer Dereference
System Score Found at
cvssv3.1 7.5 https://access.redhat.com/errata/RHSA-2019:0366
ssvc Track https://access.redhat.com/errata/RHSA-2019:0366
cvssv3.1 7.5 https://access.redhat.com/errata/RHSA-2019:0367
ssvc Track https://access.redhat.com/errata/RHSA-2019:0367
cvssv3 5.9 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-1000168.json
epss 0.04077 https://api.first.org/data/v1/epss?cve=CVE-2018-1000168
epss 0.04077 https://api.first.org/data/v1/epss?cve=CVE-2018-1000168
epss 0.04077 https://api.first.org/data/v1/epss?cve=CVE-2018-1000168
epss 0.04077 https://api.first.org/data/v1/epss?cve=CVE-2018-1000168
epss 0.04077 https://api.first.org/data/v1/epss?cve=CVE-2018-1000168
epss 0.04077 https://api.first.org/data/v1/epss?cve=CVE-2018-1000168
epss 0.04077 https://api.first.org/data/v1/epss?cve=CVE-2018-1000168
epss 0.04077 https://api.first.org/data/v1/epss?cve=CVE-2018-1000168
epss 0.04077 https://api.first.org/data/v1/epss?cve=CVE-2018-1000168
epss 0.04077 https://api.first.org/data/v1/epss?cve=CVE-2018-1000168
epss 0.04077 https://api.first.org/data/v1/epss?cve=CVE-2018-1000168
epss 0.04077 https://api.first.org/data/v1/epss?cve=CVE-2018-1000168
epss 0.04077 https://api.first.org/data/v1/epss?cve=CVE-2018-1000168
epss 0.04077 https://api.first.org/data/v1/epss?cve=CVE-2018-1000168
epss 0.04077 https://api.first.org/data/v1/epss?cve=CVE-2018-1000168
cvssv3 5.9 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 7.5 https://lists.debian.org/debian-lts-announce/2021/10/msg00011.html
ssvc Track https://lists.debian.org/debian-lts-announce/2021/10/msg00011.html
cvssv3.1 7.5 https://nghttp2.org/blog/2018/04/12/nghttp2-v1-31-1/
ssvc Track https://nghttp2.org/blog/2018/04/12/nghttp2-v1-31-1/
cvssv3.1 7.5 https://nodejs.org/en/blog/vulnerability/june-2018-security-releases/
ssvc Track https://nodejs.org/en/blog/vulnerability/june-2018-security-releases/
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2018-1000168
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-1000168
cvssv3.1 7.5 http://www.securityfocus.com/bid/103952
ssvc Track http://www.securityfocus.com/bid/103952
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-1000168.json
https://api.first.org/data/v1/epss?cve=CVE-2018-1000168
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000168
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
103952 http://www.securityfocus.com/bid/103952
1565035 https://bugzilla.redhat.com/show_bug.cgi?id=1565035
895566 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=895566
cpe:2.3:a:nghttp2:nghttp2:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:nghttp2:nghttp2:*:*:*:*:*:*:*:*
cpe:2.3:a:nodejs:node.js:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:nodejs:node.js:*:*:*:*:*:*:*:*
cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*
cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:*
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:*:*:*:*:*:*:*
CVE-2018-1000168 https://nvd.nist.gov/vuln/detail/CVE-2018-1000168
june-2018-security-releases https://nodejs.org/en/blog/vulnerability/june-2018-security-releases/
msg00011.html https://lists.debian.org/debian-lts-announce/2021/10/msg00011.html
nghttp2-v1-31-1 https://nghttp2.org/blog/2018/04/12/nghttp2-v1-31-1/
RHSA-2019:0366 https://access.redhat.com/errata/RHSA-2019:0366
RHSA-2019:0367 https://access.redhat.com/errata/RHSA-2019:0367
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/errata/RHSA-2019:0366
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-06-09T15:47:48Z/ Found at https://access.redhat.com/errata/RHSA-2019:0366
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/errata/RHSA-2019:0367
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-06-09T15:47:48Z/ Found at https://access.redhat.com/errata/RHSA-2019:0367
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-1000168.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:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
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:N/I:N/A:H Found at https://lists.debian.org/debian-lts-announce/2021/10/msg00011.html
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-06-09T15:47:48Z/ Found at https://lists.debian.org/debian-lts-announce/2021/10/msg00011.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nghttp2.org/blog/2018/04/12/nghttp2-v1-31-1/
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-06-09T15:47:48Z/ Found at https://nghttp2.org/blog/2018/04/12/nghttp2-v1-31-1/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nodejs.org/en/blog/vulnerability/june-2018-security-releases/
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-06-09T15:47:48Z/ Found at https://nodejs.org/en/blog/vulnerability/june-2018-security-releases/
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2018-1000168
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:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-1000168
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:N/I:N/A:H Found at http://www.securityfocus.com/bid/103952
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-06-09T15:47:48Z/ Found at http://www.securityfocus.com/bid/103952
Exploit Prediction Scoring System (EPSS)
Percentile 0.88104
EPSS Score 0.04077
Published At Aug. 16, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:30:03.091143+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.11/main.json 37.0.0