Multiple vulnerabilities in HAProxy



| Updated: 2023-12-06
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2023-40225
CVE-2023-45539
CWE-ID CWE-444
CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 HAProxy
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor HAProxy

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Inconsistent interpretation of HTTP requests

EUVDB-ID: #VU79767

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-40225

CWE-ID: CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests. A remote attacker can send a specially crafted HTTP request with empty Content-Length headers to the server and smuggle arbitrary HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

HAProxy: 2.0.0 - 2.8.1

CPE2.3 External links

https://www.haproxy.org/download/2.8/src/CHANGELOG
https://www.haproxy.org/download/2.6/src/CHANGELOG
https://cwe.mitre.org/data/definitions/436.html
https://github.com/haproxy/haproxy/issues/2237
https://www.haproxy.org/download/2.7/src/CHANGELOG
https://github.com/haproxy/haproxy/commit/6492f1f29d738457ea9f382aca54537f35f9d856


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Input validation error

EUVDB-ID: #VU83902

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-45539

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied input when processing the "#" character in the URI. A remote attacker can pass specially crafted URI to the application and view otherwise restricted file or potentially manipulate data.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

HAProxy: 2.8.0 - 2.8.1

CPE2.3 External links

https://lists.w3.org/Archives/Public/ietf-http-wg/2023JulSep/0070.html
https://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=2eab6d354322932cfec2ed54de261e4347eca9a6
https://www.mail-archive.com/haproxy%40formilux.org/msg43861.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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