#VU102294 NULL pointer dereference in stb_vorbis.c - CVE-2023-45680

Vulnerability identifier: #VU102294

Vulnerability risk: Medium

CVSSv4.0: 4.6 [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:U/U:Green]

CVE-ID: CVE-2023-45680

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
stb_vorbis.c
Universal components / Libraries / Libraries used by multiple products

Vendor: Sean Barrett

Description

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

stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. A crafted file may trigger memory allocation failure in `start_decoder`. In that case the function returns early, the `f->comment_list` is set to `NULL`, but `f->comment_list_length` is not reset. Later in `vorbis_deinit` it tries to dereference the `NULL` pointer. This issue may lead to denial of service.

Mitigation
Install update from vendor's website.

Vulnerable software versions

stb_vorbis.c: 1.22

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External links
https://github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_vorbis.c#L3660-L3666
https://github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_vorbis.c#L4208-L4215
https://securitylab.github.com/advisories/GHSL-2023-145_GHSL-2023-151_stb_image_h/

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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.