Resource management error in apache2 (Alpine package)

1) Resource management error

EUVDB-ID: #VU14913

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-2018-11763

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to incorrect handling of large SETTINGS frames in HTTP/2 connections. A remote attacker can repeatedly send large SETTINGS frames within an established HTTP/2 connection and consume all available threads and CPU time.

Successful exploitation of the vulnerability may allow an attacker to perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

apache2 (Alpine package): 2.4.23-r0 - 2.4.34-r1

CPE2.3

• cpe:2.3:o:alpine:apache2_alpine_package:2.4.23-r0:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:apache2_alpine_package:2.4.23-r1:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:apache2_alpine_package:2.4.23-r3:*:*:*:*:alpine_linux:*:

External links

http://git.alpinelinux.org/aports/commit/?id=5e5b0f62c33e4bdae00d4d44fbf447c6086985aa
http://git.alpinelinux.org/aports/commit/?id=cd9513a22803b7768db28a97e5bcf9f65cceb9d2
http://git.alpinelinux.org/aports/commit/?id=ea785d01e00a8c2a6c9b8b35535c5e3e5da1178b
http://git.alpinelinux.org/aports/commit/?id=f6d1356e6015d7539e9c147abbd2e13d4e2e0251

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.