Denial of service in zlib (Alpine package)

1) Denial of service

EUVDB-ID: #VU6664

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-9841

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The weakness exists in zlib due to out-of-bounds pointer arithmetic in inftrees.c. A remote attacker can cause the application to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Install update from vendor's website.

Vulnerable software versions

zlib (Alpine package): 1.2.8-r2 - 1.2.11-r0

perl (Alpine package): 5.24.3-r0

CPE2.3

• cpe:2.3:a:alpine:zlib_alpine_package:1.2.8-r2:*:*:*:*:alpine_linux:*:3.2
• cpe:2.3:a:alpine:zlib_alpine_package:1.2.11-r0:*:*:*:*:alpine_linux:*:3.3
• cpe:2.3:a:alpine:perl_alpine_package:5.24.3-r0:*:*:*:*:alpine_linux:*:3.4

External links

https://git.alpinelinux.org/aports/commit/?id=655e1b330491f425fa03eea4ac25bbbf3f29c2df
https://git.alpinelinux.org/aports/commit/?id=7e4d736879a3ca05e4c26194fdfebe0a27b26f9c
https://git.alpinelinux.org/aports/commit/?id=852b09befcff3346184cfa94f712d6a2f85f10f7
https://git.alpinelinux.org/aports/commit/?id=6d398ff0e70f7a9b420319047051b4d7c7e42f17
https://git.alpinelinux.org/aports/commit/?id=7b52a76dd3513db686d4937fbc144f188ef101fa

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.