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CVE-2023-6992— Memory corruption issues is Cloudflare zlib implementation

Quick assessment

Affected
Cloudflare zlib
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

zlib是美国Mark Adler个人开发者的一个通用的数据压缩库。 zlib存在安全漏洞，该漏洞源于存在缓冲区溢出漏洞，导致deflate.c出现内存损坏。

CVSS 4.0 · Medium EPSS 0.24% · P13

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2023-6992

Vulnerability Information
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Vulnerability Title
Memory corruption issues is Cloudflare zlib implementation
Source: CVE Program / CVE List V5
Vulnerability Description
Cloudflare version of zlib library was found to be vulnerable to memory corruption issues affecting the deflation algorithm implementation (deflate.c). The issues resulted from improper input validation and heap-based buffer overflow. A local attacker could exploit the problem during compression using a crafted malicious file potentially leading to denial of service of the software. Patches: The issue has been patched in commit 8352d10 https://github.com/cloudflare/zlib/commit/8352d108c05db1bdc5ac3bdf834dad641694c13c . The upstream repository is not affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
zlib 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
zlib是美国Mark Adler个人开发者的一个通用的数据压缩库。 zlib存在安全漏洞，该漏洞源于存在缓冲区溢出漏洞，导致deflate.c出现内存损坏。
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
Cloudflare zlib 0 ~ 8352d10 -

II. Public POCs for CVE-2023-6992

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III. Intelligence Information for CVE-2023-6992

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Vendor Advisories for CVE-2023-6992 (1)

Other References for CVE-2023-6992 (1)

IV. Related Vulnerabilities

Same product: zlib
Same vendor: Cloudflare
Same weakness: CWE-20

V. Comments for CVE-2023-6992

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