Improper input validation in apache2 (Alpine package)

1) Improper input validation

EUVDB-ID: #VU13908

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-2018-1333

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient filtering of incoming data within "mod_http2" apache module. A remote attacker can send a specially crafted HTTP request to the affected web server and trigger daemon crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

apache2 (Alpine package): 2.4.4-r0 - 2.4.33-r1

CPE2.3

• cpe:2.3:o:alpine:apache2_alpine_package:2.4.4-r0:*:*:*:*:alpine_linux:*:2.4
• cpe:2.3:o:alpine:apache2_alpine_package:2.4.4-r1:*:*:*:*:alpine_linux:*:2.4
• cpe:2.3:o:alpine:apache2_alpine_package:2.4.6-r0:*:*:*:*:alpine_linux:*:2.4

External links

https://git.alpinelinux.org/aports/commit/?id=33ab47843b13d93b654662c45c924517b0d7f6f3
https://git.alpinelinux.org/aports/commit/?id=38def58c62a70b5f2aa75a8fc493e6cf6789a84f
https://git.alpinelinux.org/aports/commit/?id=426610a910eb000e769072b0f5e8c9daf07037a3
https://git.alpinelinux.org/aports/commit/?id=59a11b59748d0c389571723c781e7c0507893bf5
https://git.alpinelinux.org/aports/commit/?id=d0eedffbc4ca5e5e276ca4fa37659b64ed0284af

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.