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CVE-2021-21409Suited to automated attack · CISA

Possible request smuggling in HTTP/2 due missing validation of content-length

CVSS score

5.9

EPSS probability

%4.9

Risk score

0.3

Published

5 y ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

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Vulnerability description

DayBreach CVE AI Research

CVE-2021-21409 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty (io.netty:netty-codec-http2) before version 4.1.61.Final there is a vulnerability that enables request smuggling. The content-length header is not correctly validated if the request only uses a single Http2HeaderFrame with the endStream set to to true. This could lead to request smuggling if the request is proxied to a remote peer and translated to HTTP/1.1. This is a followup of GHSA-wm47-8v5p-wjpj/CVE-2021-21295 which did miss to fix this one case. This was fixed as part of 4.1.61.Final.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2021-21409 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1nettynetty View
2nettynetty View
3debiandebian linux View
4netapponcommand api services View
5netapponcommand workflow automation View
6oraclebanking corporate lending process management View
7oraclebanking corporate lending process management View
8oraclebanking corporate lending process management View
9oraclebanking credit facilities process management View
10oraclebanking credit facilities process management View
11oraclebanking credit facilities process management View
12oraclebanking trade finance process management View
13oraclebanking trade finance process management View
14oraclebanking trade finance process management View
15oraclecoherence View
16oraclecoherence View
17oraclecommunications brm - elastic charging engine View
18oraclecommunications cloud native core console View
19oraclecommunications cloud native core policy View
20oraclecommunications design studio View
21oraclecommunications messaging server View
22oraclehelidon View
23oraclehelidon View
24oraclejd edwards enterpriseone tools View
25oraclenosql database View
26oracleprimavera gateway View
27oracleprimavera gateway View
28oracleprimavera gateway View
29quarkusquarkus View
Total affected vendors: 5|Products: 29

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
5.9CVSS V31MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:NNVD
5.9CVSS V3_1MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:NCVE CNA
4.3CVSS V2—AV:N/AC:M/Au:N/C:N/I:P/A:NNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

5 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-21409 is associated with the following CWEs:

CWE-444: Common Weakness Enumeration Entry CWE-444

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-21409 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

https://github.com/netty/netty/security/advisories/GHSA-f256-j965-7f32vendor-advisoryhttps://github.com/netty/netty/security/advisories/GHSA-wm47-8v5p-wjpjvendor-advisoryhttps://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21295vendor-advisoryhttps://github.com/netty/netty/commit/b0fa4d5aab4215f3c22ce6123dd8dd5f38dc0432vendor-advisoryDSA-4885vendor-advisory[zookeeper-dev] 20210407 [jira] [Created] (ZOOKEEPER-4278) dependency-check:check failing - netty-transport-4.1.60.Final CVE-2021-21409vendor-advisory[zookeeper-issues] 20210407 [jira] [Assigned] (ZOOKEEPER-4278) dependency-check:check failing - netty-transport-4.1.60.Final CVE-2021-21409vendor-advisory[zookeeper-issues] 20210407 [jira] [Created] (ZOOKEEPER-4278) dependency-check:check failing - netty-transport-4.1.60.Final CVE-2021-21409vendor-advisory[zookeeper-issues] 20210408 [jira] [Comment Edited] (ZOOKEEPER-4278) dependency-check:check failing - netty-transport-4.1.60.Final CVE-2021-21409vendor-advisory[zookeeper-issues] 20210408 [jira] [Commented] (ZOOKEEPER-4278) dependency-check:check failing - netty-transport-4.1.60.Final CVE-2021-21409vendor-advisory

CVSS Vector Radar Chart

5.9 / 10
Attack VectorNetworkComplexityHighPrivilegesNoneUser Interact.NoneConfidentialityHighIntegrityNoneAvailabilityNone

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)High
Integrity (Bütünlük)None
Availability (Erişilebilirlik)None

Yama doğrulandı

5 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

N
netty logo
netty
D
debian logo
debian
N
netapp logo
netapp
O
oracle logo
oracle
Q
quarkus logo
quarkus

Weakness Type (CWE & CAPEC)

CWE-444

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