Resource management error in nginx (Alpine package)

1) Resource management error

EUVDB-ID: #VU15745

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-16843

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 excessive memory usage when processing HTTP/2 requests within the ngx_http_v2_module module. A remote attacker can send specially crafted HTTP/2 requests to the affected web server and consume all available memory on the system and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

nginx (Alpine package): 1.10.0-r0 - 1.12.2-r1

CPE2.3

• cpe:2.3:o:alpine:nginx_alpine_package:1.10.0-r0:*:*:*:*:alpine_linux:*:3.3
• cpe:2.3:o:alpine:nginx_alpine_package:1.10.1-r0:*:*:*:*:alpine_linux:*:3.3
• cpe:2.3:o:alpine:nginx_alpine_package:1.10.3-r0:*:*:*:*:alpine_linux:*:3.4

External links

https://git.alpinelinux.org/aports/commit/?id=6e8dc30ce258648d95eb57892b407d0ae7b72981
https://git.alpinelinux.org/aports/commit/?id=cbfc890c785c113b462f0cb5bbbe873503b00c9f
https://git.alpinelinux.org/aports/commit/?id=45003dac9059e38b73687135bba6c67874b992a2
https://git.alpinelinux.org/aports/commit/?id=820edddd99fb21127b48d61ab5bcf8705d1b03b6
https://git.alpinelinux.org/aports/commit/?id=e86a2a9f72ca3473b25cd7ae7085d79c368615b0
https://git.alpinelinux.org/aports/commit/?id=6b75c937d616093cfc19f88eb23252e393cc3307
https://git.alpinelinux.org/aports/commit/?id=e104e0f441e5234364ca25e6467d1b1e30766f17

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.