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CVE-2021-23437— Regular Expression Denial of Service (ReDoS)

Quick assessment

Affected
n/a Pillow
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.

Pillow是一款基于Python的图像处理库。 python中pillow模块8.3.2之前版本存在缓冲区错误漏洞，该漏洞源于网络系统或产品的代码开发过程中存在设计或实现不当的问题，攻击者利用该漏洞可导致拒绝服务。

CVSS 7.5 · High EPSS 3.18% · P88

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2021-23437

Vulnerability Information
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Vulnerability Title
Regular Expression Denial of Service (ReDoS)
Source: CVE Program / CVE List V5
Vulnerability Description
The package pillow 5.2.0 and before 8.3.2 are vulnerable to Regular Expression Denial of Service (ReDoS) via the getrgb function.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Pillow 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Pillow是一款基于Python的图像处理库。 python中pillow模块8.3.2之前版本存在缓冲区错误漏洞，该漏洞源于网络系统或产品的代码开发过程中存在设计或实现不当的问题，攻击者利用该漏洞可导致拒绝服务。
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
- Pillow 0 ~ unspecified -

II. Public POCs for CVE-2021-23437

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III. Intelligence Information for CVE-2021-23437

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Patches & Fixes for CVE-2021-23437 (1)

Vendor Advisories for CVE-2021-23437 (2)

Mailing List Discussions for CVE-2021-23437 (2)

Other References for CVE-2021-23437 (1)

Same Patch Batch · n/a · 2021-09-03 · 5 CVEs total

CVE-2021-40492 Gibbon 跨站脚本漏洞
CVE-2021-40494 AdaptiveScale LXDUI 信任管理问题漏洞
CVE-2021-40490 Linux kernel 竞争条件问题漏洞
CVE-2021-40491 GNU Inetutils数据伪造问题漏洞

IV. Related Vulnerabilities

Same product: Pillow
Same vendor: n/a

V. Comments for CVE-2021-23437

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