CVE-2021-39242

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2021-39242
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-39242.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-39242
Aliases
Downstream
Published
2021-08-17T19:15:08.320Z
Modified
2026-03-10T23:44:12.740390Z
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 issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It can lead to a situation with an attacker-controlled HTTP Host header, because a mismatch between Host and authority is mishandled.

References

Affected packages

Git / git.haproxy.org/haproxy-2.2.git

Affected ranges

Type
GIT
Repo
https://git.haproxy.org/haproxy-2.2.git
Events
Introduced
3a00c915fd241fc398a080a11ccac9c5c46791ce
Fixed
d34216bf97346ab6783ed877b8137cd31b8494c1
Database specific 
{
    "versions": [
        {
            "introduced": "2.2.0"
        },
        {
            "fixed": "2.2.16"
        }
    ]
}
Type
GIT
Repo
https://git.haproxy.org/haproxy-2.3.git
Events
Introduced
1c0a722a83e7c45456a2b82c15889ab9ab5c4948
Fixed
ce43e1d18914d582dcabf63607548e5ecb65ebd0
Database specific 
{
    "versions": [
        {
            "introduced": "2.3.0"
        },
        {
            "fixed": "2.3.13"
        }
    ]
}
Type
GIT
Repo
https://github.com/haproxy/haproxy
Events
Introduced
6cbbecf09734aeb5fa8bb88f36f06a6f6d35e813
Fixed
a786c41f1fa7abf85e76abfe1ba09b0aed99190d
Database specific 
{
    "versions": [
        {
            "introduced": "2.4.0"
        },
        {
            "fixed": "2.4.3"
        }
    ]
}

Affected versions

v2.*
v2.2.0
v2.2.1
v2.2.10
v2.2.11
v2.2.12
v2.2.13
v2.2.14
v2.2.15
v2.2.2
v2.2.3
v2.2.4
v2.2.5
v2.2.6
v2.2.7
v2.2.8
v2.2.9
v2.3.0
v2.3.1
v2.3.10
v2.3.11
v2.3.12
v2.3.2
v2.3.3
v2.3.4
v2.3.5
v2.3.6
v2.3.7
v2.3.8
v2.3.9
v2.4.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-39242.json"
unresolved_ranges 
[
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "11.0"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "33"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "34"
            }
        ]
    }
]