#VU102290 Out-of-bounds write in stb_vorbis.c - CVE-2023-45676

Vulnerability identifier: #VU102290

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-45676

CWE-ID: CWE-787

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 execute arbitrary code.

stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. A crafted file may trigger out of bounds write in `f->vendor[i] = get8_packet(f);`. The root cause is an integer overflow in `setup_malloc`. A sufficiently large value in the variable `sz` overflows with `sz+7` in and the negative value passes the maximum available memory buffer check. This issue may lead to code execution.

Mitigation
Install update from vendor's website.

Vulnerable software versions

stb_vorbis.c: 1.22

---

External links
https://github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_vorbis.c#L3656
https://securitylab.github.com/advisories/GHSL-2023-145_GHSL-2023-151_stb_image_h/
https://github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_vorbis.c#L950-L960

---

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.