Out-of-bounds write in apache2 (Alpine package)

1) Out-of-bounds write

EUVDB-ID: #VU20373

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-2019-10081

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error when processing HTTP/2 requests within the mod_http2 module, configured with "H2PushResource". A remote attacker can send specially crafted HTTP/2 requests to the affected server and perform denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

apache2 (Alpine package): 2.4.39-r0

CPE2.3

• cpe:2.3:a:alpine:apache2_alpine_package:2.4.39-r0:*:*:*:*:alpine_linux:*:3.6

External links

https://git.alpinelinux.org/aports/commit/?id=97cc1daad59156e767936e4ea1762d331195f7eb
https://git.alpinelinux.org/aports/commit/?id=f9dbe36405c236b51c640ef3a59f0f14baeee18d
https://git.alpinelinux.org/aports/commit/?id=2352aedda7b946046e3bb408f94d6053f6468d74
https://git.alpinelinux.org/aports/commit/?id=20dd33ed391e86126662bbb87b9b3d904e12d0b1
https://git.alpinelinux.org/aports/commit/?id=720693cedfbcd03efff48adf05e47e4f4d1528f0
https://git.alpinelinux.org/aports/commit/?id=c362e6f4f23eab577c0f6f522ec442a889ba2713
https://git.alpinelinux.org/aports/commit/?id=f69ef91711a9edd270c57081b8cd8230ad8fed24

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.