CVE-2021-40346

CVSS V2 Medium 5 CVSS V3 High 7.5
Description
An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header 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.
Overview
  • CVE ID
  • CVE-2021-40346
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-09-08T17:15:12
  • Last Modified Date
  • 2021-12-02T20:43:17
Weakness Enumerations
CWE URL
CWE-190 http://cwe.mitre.org/data/definitions/190.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* 1 OR 2.0.0 2.0.25
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* 1 OR 2.2.0 2.2.17
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* 1 OR 2.3.0 2.3.14
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* 1 OR 2.4.0 2.4.4
cpe:2.3:a:haproxy:haproxy:2.5:dev0:*:*:*:*:*:* 1 OR
cpe:2.3:a:haproxy:haproxy:2.5:dev1:*:*:*:*:*:* 1 OR
cpe:2.3:a:haproxy:haproxy:2.5:dev2:*:*:*:*:*:* 1 OR
cpe:2.3:a:haproxy:haproxy:2.5:dev3:*:*:*:*:*:* 1 OR
cpe:2.3:a:haproxy:haproxy:2.5:dev4:*:*:*:*:*:* 1 OR
cpe:2.3:a:haproxy:haproxy:2.5:dev5:*:*:*:*:*:* 1 OR
cpe:2.3:a:haproxy:haproxy:2.5:dev6:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 5
  • Severity
  • MEDIUM
  • Exploitability Score
  • 10
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 7.5
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://git.haproxy.org/?p=haproxy.git Patch Vendor Advisory
https://www.debian.org/security/2021/dsa-4968 Third Party Advisory
https://www.mail-archive.com/haproxy@formilux.org Third Party Advisory
https://www.mail-archive.com/haproxy@formilux.org/msg41114.html Mitigation Third Party Advisory
https://jfrog.com/blog/critical-vulnerability-in-haproxy-cve-2021-40346-integer-overflow-enables-http-smuggling/ Exploit Mitigation Third Party Advisory
https://github.com/haproxy/haproxy/commit/3b69886f7dcc3cfb3d166309018e6cfec9ce2c95 Patch Third Party Advisory
https://lists.apache.org/thread.html/r284567dd7523f5823e2ce995f787ccd37b1cc4108779c50a97c79120@%3Cdev.cloudstack.apache.org%3E Mailing List Third Party Advisory
https://lists.apache.org/thread.html/r8a58fd7a29808e5d27ee56877745e58dc4bb041b9af94601554e2a5a@%3Cdev.cloudstack.apache.org%3E Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A7V2IYO22LWVBGUNZWVKNTMDV4KINLFO/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MXTSBY2TEAXWZVFQM3CXHJFRONX7PEMN/ Mailing List Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-40346
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-40346
History
Created Old Value New Value Data Type Notes
2022-05-10 06:43:29 Added to TrackCVE
2022-12-05 10:08:09 2021-09-08T17:15Z 2021-09-08T17:15:12 CVE Published Date updated
2022-12-05 10:08:09 2021-12-02T20:43:17 CVE Modified Date updated
2022-12-05 10:08:09 Analyzed Vulnerability Status updated