Denial of service in HAProxy



| Updated: 2019-11-24
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-14241
CWE-ID CWE-835
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 one medium risk vulnerability.

1) Infinite loop

EUVDB-ID: #VU22942

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-14241

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop while processing cookies in the htx_manage_client_side_cookies() function in proto_htx.c. A remote attacker can send a specially crafted request to the proxy server, consume all available system resources and cause denial of service conditions.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

HAProxy: 2.0.0 - 2.0.2

CPE2.3 External links

https://github.com/haproxy/haproxy/issues/181


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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