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Vulnerability details: VCID-z9uy-y3pu-zug8
Vulnerability ID VCID-z9uy-y3pu-zug8
Aliases CVE-2019-19330
Summary The HTTP/2 implementation in HAProxy before 2.0.10 mishandles headers, as demonstrated by carriage return (CR, ASCII 0xd), line feed (LF, ASCII 0xa), and the zero character (NUL, ASCII 0x0), aka Intermediary Encapsulation Attacks.
Status Published
Exploitability 0.5
Weighted Severity 8.8
Risk 4.4
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-20 Improper Input Validation
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
System Score Found at
cvssv3 5.9 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-19330.json
epss 0.00791 https://api.first.org/data/v1/epss?cve=CVE-2019-19330
epss 0.00791 https://api.first.org/data/v1/epss?cve=CVE-2019-19330
epss 0.00791 https://api.first.org/data/v1/epss?cve=CVE-2019-19330
epss 0.00791 https://api.first.org/data/v1/epss?cve=CVE-2019-19330
epss 0.00791 https://api.first.org/data/v1/epss?cve=CVE-2019-19330
epss 0.00791 https://api.first.org/data/v1/epss?cve=CVE-2019-19330
epss 0.00791 https://api.first.org/data/v1/epss?cve=CVE-2019-19330
epss 0.00791 https://api.first.org/data/v1/epss?cve=CVE-2019-19330
epss 0.00791 https://api.first.org/data/v1/epss?cve=CVE-2019-19330
epss 0.00791 https://api.first.org/data/v1/epss?cve=CVE-2019-19330
epss 0.00791 https://api.first.org/data/v1/epss?cve=CVE-2019-19330
epss 0.00791 https://api.first.org/data/v1/epss?cve=CVE-2019-19330
epss 0.00791 https://api.first.org/data/v1/epss?cve=CVE-2019-19330
epss 0.00791 https://api.first.org/data/v1/epss?cve=CVE-2019-19330
cvssv3.1 5.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 7.5 https://nvd.nist.gov/vuln/detail/CVE-2019-19330
cvssv3.1 9.8 https://nvd.nist.gov/vuln/detail/CVE-2019-19330
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-19330.json
https://api.first.org/data/v1/epss?cve=CVE-2019-19330
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19330
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://git.haproxy.org/?p=haproxy-2.0.git%3Ba=commit%3Bh=ac198b92d461515551b95daae20954b3053ce87e
https://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=146f53ae7e97dbfe496d0445c2802dd0a30b0878
https://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=54f53ef7ce4102be596130b44c768d1818570344
https://seclists.org/bugtraq/2019/Nov/45
https://security.gentoo.org/glsa/202004-01
https://tools.ietf.org/html/rfc7540#section-10.3
https://www.debian.org/security/2019/dsa-4577
1777584 https://bugzilla.redhat.com/show_bug.cgi?id=1777584
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
CVE-2019-19330 https://nvd.nist.gov/vuln/detail/CVE-2019-19330
RHSA-2020:1287 https://access.redhat.com/errata/RHSA-2020:1287
RHSA-2020:1725 https://access.redhat.com/errata/RHSA-2020:1725
RHSA-2020:1936 https://access.redhat.com/errata/RHSA-2020:1936
RHSA-2020:2265 https://access.redhat.com/errata/RHSA-2020:2265
USN-4212-1 https://usn.ubuntu.com/4212-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-19330.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:N/I:L/A:N 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: AV:N/AC:L/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2019-19330
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:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2019-19330
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 0.72877
EPSS Score 0.00791
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:14:31.859869+00:00 Ubuntu USN Importer Import https://usn.ubuntu.com/4212-1/ 36.1.3