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CVE-2021-29479— Cached redirect poisoning via X-Forwarded-Host header

Quick assessment

Affected
ratpack ratpack
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.

Ratpack是一款用于构建可扩展HTTP应用程序的Java库。 Ratpack 1.9.0之前的版本中存在安全漏洞，攻击者可以利用此漏洞强制缓存重定向到他们的站点。

CVSS 7.0 · High EPSS 0.86% · P57

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2021-29479

Vulnerability Information
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Vulnerability Title
Cached redirect poisoning via X-Forwarded-Host header
Source: CVE Program / CVE List V5
Vulnerability Description
Ratpack is a toolkit for creating web applications. In versions prior to 1.9.0, a user supplied `X-Forwarded-Host` header can be used to perform cache poisoning of a cache fronting a Ratpack server if the cache key does not include the `X-Forwarded-Host` header as a cache key. Users are only vulnerable if they do not configure a custom `PublicAddress` instance. For versions prior to 1.9.0, by default, Ratpack utilizes an inferring version of `PublicAddress` which is vulnerable. This can be used to perform redirect cache poisoning where an attacker can force a cached redirect to redirect to their site instead of the intended redirect location. The vulnerability was patched in Ratpack 1.9.0. As a workaround, ensure that `ServerConfigBuilder::publicAddress` correctly configures the server in production.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在安全决策中依赖未经信任的输入
Source: CVE Program / CVE List V5
Vulnerability Title
Ratpack 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ratpack是一款用于构建可扩展HTTP应用程序的Java库。 Ratpack 1.9.0之前的版本中存在安全漏洞，攻击者可以利用此漏洞强制缓存重定向到他们的站点。
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
ratpack ratpack < 1.9.0 -

II. Public POCs for CVE-2021-29479

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III. Intelligence Information for CVE-2021-29479

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Vendor Advisories for CVE-2021-29479 (1)

Other References for CVE-2021-29479 (1)

Same Patch Batch · ratpack · 2021-06-29 · 4 CVEs total

CVE-2021-29485 9.9 CRITICAL Remote Code Execution Vulnerability in Session Storage
CVE-2021-29481 6.5 MEDIUM Client side sessions should not allow unencrypted storage
CVE-2021-29480 4.4 MEDIUM Default client side session signing key is highly predictable

IV. Related Vulnerabilities

Same product: ratpack
Same vendor: ratpack
Same weakness: CWE-807

V. Comments for CVE-2021-29479

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