CVE-2021-40346
- Source
- https://cve.org/CVERecord?id=CVE-2021-40346
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-40346.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-40346
- Aliases
- Downstream
- Related
- Published
- 2021-09-08T17:15:12.457Z
- Modified
- 2026-02-23T08:26:05.175718Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
- Summary
- [none]
- Details
-
An integer overflow exists in HAProxy 2.0 through 2.5 in htxaddheader that can be exploited to perform an HTTP request smuggling attack, allowing an attacker to bypass all configured http-request HAProxy ACLs and possibly other ACLs.
- References
-
- https://lists.apache.org/thread.html/r284567dd7523f5823e2ce995f787ccd37b1cc4108779c50a97c79120%40%3Cdev.cloudstack.apache.org%3E
- https://lists.apache.org/thread.html/r8a58fd7a29808e5d27ee56877745e58dc4bb041b9af94601554e2a5a%40%3Cdev.cloudstack.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A7V2IYO22LWVBGUNZWVKNTMDV4KINLFO/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MXTSBY2TEAXWZVFQM3CXHJFRONX7PEMN/
- https://www.mail-archive.com/haproxy%40formilux.org
- https://www.mail-archive.com/haproxy%40formilux.org/msg41114.html
- https://git.haproxy.org/?p=haproxy.git
- https://github.com/haproxy/haproxy/commit/3b69886f7dcc3cfb3d166309018e6cfec9ce2c95
- https://jfrog.com/blog/critical-vulnerability-in-haproxy-cve-2021-40346-integer-overflow-enables-http-smuggling/
- https://www.debian.org/security/2021/dsa-4968
- https://git.haproxy.org/?p=haproxy.git
- https://github.com/haproxy/haproxy/commit/3b69886f7dcc3cfb3d166309018e6cfec9ce2c95
- https://jfrog.com/blog/critical-vulnerability-in-haproxy-cve-2021-40346-integer-overflow-enables-http-smuggling/
- https://jfrog.com/blog/critical-vulnerability-in-haproxy-cve-2021-40346-integer-overflow-enables-http-smuggling/
Affected packages
Git
git.haproxy.org/haproxy-2.0.git
Affected ranges
- Type
- GIT
- Repo
- https://git.haproxy.org/haproxy-2.0.git
- Events
-
Introducedba23630ad009464dc8e4d01dac9ce779eb84cc2aFixed6986403b83388dff69b0d4cda2ab144b7b516936
git.haproxy.org/haproxy-2.2.git
Affected ranges
- Type
- GIT
- Repo
- https://git.haproxy.org/haproxy-2.2.git
- Events
-
Introduced3a00c915fd241fc398a080a11ccac9c5c46791ceFixeddd94a25981b3e2a58e7c1b23b713267a7829a396
git.haproxy.org/haproxy-2.3.git
github.com/haproxy/haproxy
Affected ranges
- Type
- GIT
- Repo
- https://github.com/haproxy/haproxy
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedIntroducedFixed
Database specific
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-40346.json"
vanir_signatures
[
{
"id": "CVE-2021-40346-720f56ce",
"target": {
"function": "htx_add_trailer",
"file": "include/haproxy/htx.h"
},
"signature_version": "v1",
"deprecated": false,
"source": "https://github.com/haproxy/haproxy/commit/3b69886f7dcc3cfb3d166309018e6cfec9ce2c95",
"digest": {
"function_hash": "250362322674641590349589051495230156653",
"length": 397.0
},
"signature_type": "Function"
},
{
"id": "CVE-2021-40346-a2320c5c",
"target": {
"function": "htx_add_header",
"file": "include/haproxy/htx.h"
},
"signature_version": "v1",
"deprecated": false,
"source": "https://github.com/haproxy/haproxy/commit/3b69886f7dcc3cfb3d166309018e6cfec9ce2c95",
"digest": {
"function_hash": "137971134793007557031146476273999624430",
"length": 397.0
},
"signature_type": "Function"
},
{
"id": "CVE-2021-40346-ff6b9c62",
"target": {
"file": "include/haproxy/htx.h"
},
"signature_version": "v1",
"deprecated": false,
"source": "https://github.com/haproxy/haproxy/commit/3b69886f7dcc3cfb3d166309018e6cfec9ce2c95",
"digest": {
"threshold": 0.9,
"line_hashes": [
"103378957073333009210878063361820249918",
"90642999860060403562236023336123966002",
"87325895267160897988184542515128014985",
"258426726845170808120248969356574058873",
"156690178870054102966697089710863666198",
"97589094008776621651354770360189691565"
]
},
"signature_type": "Line"
}
]