#VU38626 NULL pointer dereference in libvorbis - CVE-2017-11333

Vulnerability identifier: #VU38626

Vulnerability risk: Medium

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2017-11333

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
libvorbis
Universal components / Libraries / Libraries used by multiple products

Vendor: xiph.org

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The vorbis_analysis_wrote function in lib/block.c in Xiph.Org libvorbis 1.3.5 allows remote attackers to cause a denial of service (OOM) via a crafted wav file.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libvorbis: 1.3.5

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External links
https://seclists.org/fulldisclosure/2017/Jul/82
https://lists.debian.org/debian-lts-announce/2018/04/msg00033.html
https://lists.debian.org/debian-lts-announce/2019/12/msg00021.html
https://www.exploit-db.com/exploits/42399/

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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. However, proof of concept for this vulnerability is available.