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CVE-2023-45677— Heap buffer out of bounds write in start_decoder in stb_vorbis

Quick assessment

Affected
nothings stb
Exploitation
Public or AI PoC available; prioritize validation
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Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

stb_vorbis是一款开源的用于解码ogg vorbis文件的音频解码器。 stb_vorbis 存在安全漏洞，该漏洞源于精心设计的文件可能会触发“f->vendor[len] = (char) ;”中的越界写入。

CVSS 7.3 · High EPSS 0.54% · P43

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2023-45677

Vulnerability Information
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Vulnerability Title
Heap buffer out of bounds write in start_decoder in stb_vorbis
Source: CVE Program / CVE List V5
Vulnerability Description
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 `len` read in `start_decoder` is a negative number and `setup_malloc` successfully allocates memory in that case, but memory write is done with a negative index `len`. Similarly if len is INT_MAX the integer overflow len+1 happens in `f->vendor = (char*)setup_malloc(f, sizeof(char) * (len+1));` and `f->comment_list[i] = (char*)setup_malloc(f, sizeof(char) * (len+1));`. This issue may lead to code execution.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
stb_vorbis 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
stb_vorbis是一款开源的用于解码ogg vorbis文件的音频解码器。 stb_vorbis 存在安全漏洞，该漏洞源于精心设计的文件可能会触发“f->vendor[len] = (char) ;”中的越界写入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nothings stb <= 1.22 -

II. Public POCs for CVE-2023-45677

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Qwen3.6-35B-A3B · 12511 chars
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III. Intelligence Information for CVE-2023-45677

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Other References for CVE-2023-45677 (6)

Same Patch Batch · nothings · 2023-10-20 · 14 CVEs total

CVE-2023-45681 7.3 HIGH Out of bounds heap buffer write in stb_vorbis
CVE-2023-45679 7.3 HIGH Attempt to free an uninitialized memory pointer in vorbis_deinit in stb_vorbis
CVE-2023-45676 7.3 HIGH Multi-byte write heap buffer overflow in start_decoder in stb_vorbis
CVE-2023-45666 7.3 HIGH Possible double-free or memory leak in stbi__load_gif_main in stb_image
CVE-2023-45664 7.3 HIGH Double-free in stbi__load_gif_main_outofmem in stb_image
CVE-2023-45678 6.5 MEDIUM Off-by-one heap buffer write in start_decoder in stb_vorbis
CVE-2023-45675 6.5 MEDIUM 0 byte write heap buffer overflow in start_decoder in stb_vorbis
CVE-2023-45662 6.5 MEDIUM Multi-byte read heap buffer overflow in stbi__vertical_flip in stb_image
CVE-2023-45661 6.5 MEDIUM Wild address read in stbi__gif_load_next in stb_image
CVE-2023-45682 5.3 MEDIUM Wild address read in vorbis_decode_packet_rest in stb_vorbis
CVE-2023-45680 5.3 MEDIUM Null pointer dereference in vorbis_deinit in stb_vorbis
CVE-2023-45667 5.3 MEDIUM Null pointer dereference because of an uninitialized variable in stb_image
CVE-2023-45663 5.3 MEDIUM Disclosure of uninitialized memory in stbi__tga_load in stb_image

IV. Related Vulnerabilities

Same product: stb
Same vendor: nothings
Same weakness: CWE-787

V. Comments for CVE-2023-45677

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