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Advisory details: gitlab / maven/org.apache.zookeeper/zookeeper/CVE-2021-21295
Advisory ID gitlab/maven/org.apache.zookeeper/zookeeper/CVE-2021-21295
Aliases CVE-2021-21295
GHSA-wm47-8v5p-wjpj
Summary Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. `Http2StreamFrameToHttpObjectCodec` is used to convert to HTTP/1.1 objects, and these HTTP/1.1 objects are forwarded to another remote peer. This has been patched Final As a workaround, the user can do the validation by themselves by implementing a custom `ChannelInboundHandler` that is put in the `ChannelPipeline` behind `Http2StreamFrameToHttpObjectCodec`.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (3)
CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv2 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.zookeeper/zookeeper/CVE-2021-21295.yml
cvssv3.1 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.zookeeper/zookeeper/CVE-2021-21295.yml
Reference id Reference type URL
https://github.com/Netflix/zuul/pull/980
https://github.com/netty/netty/commit/89c241e3b1795ff257af4ad6eadc616cb2fb3dc4
https://www.debian.org/security/2021/dsa-4885
CVE-2021-21295 https://nvd.nist.gov/vuln/detail/CVE-2021-21295
GHSA-wm47-8v5p-wjpj https://github.com/netty/netty/security/advisories/GHSA-wm47-8v5p-wjpj
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: AV:N/AC:H/Au:N/C:N/I:P/A:N Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.zookeeper/zookeeper/CVE-2021-21295.yml
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.zookeeper/zookeeper/CVE-2021-21295.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

There are no SSVC decisions available.