Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2021-27577— Incorrect handling of url fragment leads to cache poisoning

Quick assessment

Affected
Apache Software Foundation Apache Traffic Server
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.

Apache Traffic Server（ATS）是美国阿帕奇（Apache）基金会的一套可扩展的HTTP代理和缓存服务器。 Apache Traffic Server 中存在环境问题漏洞，该漏洞源于未能对URL数据段做正确处理。攻击者可通过该漏洞影响目标服务的缓存。以下产品及版本受到影响： Apache Traffic Server 7.0.0 ~ 7.1.12、8.0.0 ~ 8.1.1、9.0.0 ~ 9.0.1。

AI Predicted 7.5 Difficulty: Moderate EPSS 3.54% · P89

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-27577

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Incorrect handling of url fragment leads to cache poisoning
Source: CVE Program / CVE List V5
Vulnerability Description
Incorrect handling of url fragment vulnerability of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Traffic Server 环境问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Traffic Server（ATS）是美国阿帕奇（Apache）基金会的一套可扩展的HTTP代理和缓存服务器。 Apache Traffic Server 中存在环境问题漏洞，该漏洞源于未能对URL数据段做正确处理。攻击者可通过该漏洞影响目标服务的缓存。以下产品及版本受到影响： Apache Traffic Server 7.0.0 ~ 7.1.12、8.0.0 ~ 8.1.1、9.0.0 ~ 9.0.1。
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
Apache Software Foundation Apache Traffic Server Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1 -

II. Public POCs for CVE-2021-27577

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-27577

请登录查看更多情报信息。

Vendor Advisories for CVE-2021-27577 (1)

Mailing List Discussions for CVE-2021-27577 (1)

IV. Related Vulnerabilities

Same product: Apache Traffic Server
Same vendor: Apache Software Foundation
Same weakness: CWE-444

V. Comments for CVE-2021-27577

No comments yet

Leave a comment