Vulnerability identifier: #VU14915

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-14645

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
HAProxy
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: HAProxy

Description

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

The vulnerability exists due to a boundary condition within the HPACK decoder in hpack_valid_idx() function. A remote attacker can send a specially specially crafted HTTP/2 request, trigger out-of-bounds read error and perform a denial of service attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

HAProxy: 1.8.0 - 1.8.13

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External links
http://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14645
http://www.mail-archive.com/haproxy@formilux.org/msg31253.html

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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