CVE-2021-43797CWE-444

CVE-2021-43797

Medium · published December 10, 2021

CVSS v3.1
6.5
EPSS
3%
Percentile
86.8
In the wild
Unconfirmed
What it is

Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. Netty prior to version 4.1.71.Final skips control chars when they are present at the beginning / end of the header name. It should instead fail fast as these are not allowed by the spec and could lead to HTTP request smuggling. Failing to do the validation might cause netty to "sanitize" header names before it forward these to another remote system when used as proxy. This remote system can't see the invalid usage anymore, and therefore does not do the validation itself. Users should upgrade to version 4.1.71.Final.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.02884 · 86.8th percentile
Weakness
CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Published
2021-12-10T00:15Z
Affected products (22)
ProductVersionsFixed in
netty/netty< 4.1.714.1.71
quarkus/quarkus< 2.5.32.5.3
netapp/oncommand_workflow_automationall versions—
netapp/snapcenterall versions—
oracle/banking_deposits_and_lines_of_credit_servicingall versions—
oracle/banking_party_managementall versions—
oracle/banking_platformall versions—
oracle/coherenceall versions—
oracle/coherenceall versions—
oracle/communications_cloud_native_core_binding_support_functionall versions—
oracle/communications_cloud_native_core_network_slice_selection_functionall versions—
oracle/communications_cloud_native_core_policyall versions—
oracle/communications_cloud_native_core_security_edge_protection_proxyall versions—
oracle/communications_cloud_native_core_unified_data_repositoryall versions—
oracle/communications_design_studioall versions—
oracle/communications_instant_messaging_serverall versions—
oracle/helidonall versions—
oracle/helidonall versions—
oracle/peoplesoft_enterprise_peopletoolsall versions—
oracle/peoplesoft_enterprise_peopletoolsall versions—
debian/debian_linuxall versions—
debian/debian_linuxall versions—
References (14)
EPSS history
Timeline
  • 09 DEC 00:00Z
    HTTP fails to validate against control chars in header names which may lead to HTTP request smuggling
    cvelistv5