stb_vorbis OGG Vorbis File out-of-bounds write

Summaryinfo

A vulnerability was found in stb_vorbis. It has been declared as critical. Affected is an unknown function of the component OGG Vorbis File Handler. Executing a manipulation can lead to out-of-bounds write. This vulnerability appears as CVE-2023-45675. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in stb_vorbis (version now known). It has been declared as critical. This vulnerability affects some unknown processing of the component OGG Vorbis File Handler. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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[len] = (char)'\0';`. The root cause is that if the len read in `start_decoder` is `-1` and `len + 1` becomes 0 when passed to `setup_malloc`. The `setup_malloc` behaves differently when `f->alloc.alloc_buffer` is pre-allocated. Instead of returning `NULL` as in `malloc` case it shifts the pre-allocated buffer by zero and returns the currently available memory block. This issue may lead to code execution.

The weakness was presented 10/21/2023 as GHSL-2023-145. The advisory is shared for download at securitylab.github.com. This vulnerability was named CVE-2023-45675 since 10/10/2023. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/06/2025).

The vulnerability scanner Nessus provides a plugin with the ID 232159 (Linux Distros Unpatched Vulnerability : CVE-2023-45675), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (232159). VulDB is the best source for vulnerability data and more expert information about this specific topic.

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• stb_vorbis

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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