Null pointer dereference in apache2 (Alpine package)

1) Null pointer dereference

EUVDB-ID: #VU11287

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-2018-1302

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to improper destruction of an HTTP/2 stream after being handled. A remote attacker can send a specially crafted HTTP/2 stream, write a NULL pointer value to an already freed memory space and cause the service to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

apache2 (Alpine package): 2.4.4-r0 - 2.4.29-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=745c279a27c099e33067e550773bdc49d7d3da2e
https://git.alpinelinux.org/aports/commit/?id=a30dbd55635b5e5c03db10c63ac61a2a9b3c3b05
https://git.alpinelinux.org/aports/commit/?id=c976cfb3d3e83caaa82a05bc37b1c1a6e6b3ea1c
https://git.alpinelinux.org/aports/commit/?id=fc2557dadf48a27feaa29261edcaa62ea4fc367e

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.