ID

VAR-202103-1564

CVE

CVE-2021-21295

TITLE

Netty Environmental problem loophole

DESCRIPTION

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 4.1.60.Final there is a vulnerability that enables request smuggling. If a Content-Length header is present in the original HTTP/2 request, the field is not validated by `Http2MultiplexHandler` as it is propagated up. This is fine as long as the request is not proxied through as HTTP/1.1. If the request comes in as an HTTP/2 stream, gets converted into the HTTP/1.1 domain objects (`HttpRequest`, `HttpContent`, etc.) via `Http2StreamFrameToHttpObjectCodec `and then sent up to the child channel's pipeline and proxied through a remote peer as HTTP/1.1 this may result in request smuggling. In a proxy case, users may assume the content-length is validated somehow, which is not the case. If the request is forwarded to a backend channel that is a HTTP/1.1 connection, the Content-Length now has meaning and needs to be checked. An attacker can smuggle requests inside the body as it gets downgraded from HTTP/2 to HTTP/1.1. For an example attack refer to the linked GitHub Advisory. Users are only affected if all of this is true: `HTTP2MultiplexCodec` or `Http2FrameCodec` is used, `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 in 4.1.60.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`. For the stable distribution (buster), these problems have been fixed in version 1:4.1.33-1+deb10u2. We recommend that you upgrade your netty packages. For the detailed security status of netty please refer to its security tracker page at: https://security-tracker.debian.org/tracker/netty Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/ Mailing list: debian-security-announce@lists.debian.org -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEtuYvPRKsOElcDakFEMKTtsN8TjYFAmBrXn0ACgkQEMKTtsN8 TjYiIQ/+M3dHpXdXRxZlx12OSJNsJoZa52/7uKhM9Vg0HhdCYnq7RjXTI2zZmUu7 VbL/F1ixPFgHWZpFIwHPTxZ4qk5+qQKYj7JyU1g+NyL9MkVsAW7ccYj3gbp3Kgk6 bE2GEwfh0qSKDgolflLCudGsqF1J54T65kO5oQ+Gtbx/8+NJ0YrVrHsmG1O4IMHQ 6oK/znY6CmQtUSY1p8DCNTWp63hZYpGzg9Umv/y9TaYm3QeG1BNz3tQz8uaGZQWq LihkaTSpJoo7ezNUFYinaRECylpEf7MHgK+uYkJ0MZrZ+2wyMC6V0BATVwF2Aj7X VMrRBJTSf20z5u/k0m+y9k8cR8CcR3sWVo/7mpRJAIsvnyMQwKBmxjHSlVfzOqYK 91NB7OSi/ZDKOOsdQ5oW337FPQolCXl2DOe2UW9Z1K9XFs11VplsFxMkrzZtiwba dXhq6odVZwQfzjiWGj0yFftfJSAAs9B0I1L1EqW2QR7sN25YA1OosYsc5iYvUXD7 mhjU1RtqsXK3jI9TjGmXos+6Yj36iPncNwXBL4AKKPapV5qm6mHQkXTowW1NM5vu 8NokTjKtuixgb08CAQHNe202TpQ9kGHNTe2FDKRNFQrlTaoxt2DlmHbDiLn6i1Ue k4HImGqrUw9venxQ/vPZjTW6UaTbz0D9BPQcb9ApBOAgydEjJqE= =6i6I -----END PGP SIGNATURE----- . The purpose of this text-only errata is to inform you about the security issues fixed in this release. Bugs fixed (https://bugzilla.redhat.com/): 1739497 - CVE-2019-10744 nodejs-lodash: prototype pollution in defaultsDeep function leading to modifying properties 1802531 - CVE-2019-12415 poi: a specially crafted Microsoft Excel document allows attacker to read files from the local filesystem 1831139 - CVE-2020-9488 log4j: improper validation of certificate with host mismatch in SMTP appender 1851014 - CVE-2020-2934 mysql-connector-java: allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Connectors which could result in unauthorized update, insert or delete 1851019 - CVE-2020-2875 mysql-connector-java: allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Connectors which could result in unauthorized update, insert or delete 1887648 - CVE-2020-13943 tomcat: Apache Tomcat HTTP/2 Request mix-up 1898907 - CVE-2020-26217 XStream: remote code execution due to insecure XML deserialization when relying on blocklists 1901304 - CVE-2020-27782 undertow: special character in query results in server errors 1902826 - CVE-2020-27218 jetty: buffer not correctly recycled in Gzip Request inflation 1904221 - CVE-2020-17527 tomcat: HTTP/2 request header mix-up 1905796 - CVE-2020-35510 jboss-remoting: Threads hold up forever in the EJB server by suppressing the ack from an EJB client 1908837 - CVE-2020-26259 XStream: arbitrary file deletion on the local host when unmarshalling 1922102 - CVE-2021-23926 xmlbeans: allowed malicious XML input may lead to XML Entity Expansion attack 1922123 - CVE-2020-17521 groovy: OS temporary directory leads to information disclosure 1923405 - CVE-2021-20218 fabric8-kubernetes-client: vulnerable to a path traversal leading to integrity and availability compromise 1927028 - CVE-2021-21290 netty: Information disclosure via the local system temporary directory 1928172 - CVE-2020-13949 libthrift: potential DoS when processing untrusted payloads 1930423 - CVE-2020-28491 jackson-dataformat-cbor: Unchecked allocation of byte buffer can cause a java.lang.OutOfMemoryError exception 1933808 - CVE-2020-11987 batik: SSRF due to improper input validation by the NodePickerPanel 1933816 - CVE-2020-11988 xmlgraphics-commons: SSRF due to improper input validation by the XMPParser 1934116 - CVE-2020-27223 jetty: request containing multiple Accept headers with a large number of "quality" parameters may lead to DoS 1937364 - CVE-2021-21295 netty: possible request smuggling in HTTP/2 due missing validation 1939839 - CVE-2021-27568 json-smart: uncaught exception may lead to crash or information disclosure 1942539 - CVE-2021-21341 XStream: allow a remote attacker to cause DoS only by manipulating the processed input stream 1942545 - CVE-2021-21342 XStream: SSRF via crafted input stream 1942550 - CVE-2021-21343 XStream: arbitrary file deletion on the local host via crafted input stream 1942554 - CVE-2021-21344 XStream: Unsafe deserizaliation of javax.sql.rowset.BaseRowSet 1942558 - CVE-2021-21345 XStream: Unsafe deserizaliation of com.sun.corba.se.impl.activation.ServerTableEntry 1942578 - CVE-2021-21346 XStream: Unsafe deserizaliation of sun.swing.SwingLazyValue 1942629 - CVE-2021-21347 XStream: Unsafe deserizaliation of com.sun.tools.javac.processing.JavacProcessingEnvironment NameProcessIterator 1942633 - CVE-2021-21348 XStream: ReDoS vulnerability 1942635 - CVE-2021-21349 XStream: SSRF can be activated unmarshalling with XStream to access data streams from an arbitrary URL referencing a resource in an intranet or the local host 1942637 - CVE-2021-21350 XStream: Unsafe deserizaliation of com.sun.org.apache.bcel.internal.util.ClassLoader 1942642 - CVE-2021-21351 XStream: allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream 1944888 - CVE-2021-21409 netty: Request smuggling via content-length header 1945710 - CVE-2021-28163 jetty: Symlink directory exposes webapp directory contents 1945712 - CVE-2021-28164 jetty: Ambiguous paths can access WEB-INF 1946341 - CVE-2021-22696 cxf: OAuth 2 authorization service vulnerable to DDos attacks 1948001 - CVE-2021-3536 wildfly: XSS via admin console when creating roles in domain mode 1948752 - CVE-2021-29425 apache-commons-io: Limited path traversal in Apache Commons IO 2.2 to 2.6 1962879 - CVE-2020-15522 bouncycastle: Timing issue within the EC math library 1965497 - CVE-2021-28170 jakarta-el: ELParserTokenManager enables invalid EL expressions to be evaluate 1970930 - CVE-2021-3597 undertow: HTTP2SourceChannel fails to write final frame under some circumstances may lead to DoS 1971016 - CVE-2021-28169 jetty: requests to the ConcatServlet and WelcomeFilter are able to access protected resources within the WEB-INF directory 1973392 - CVE-2021-30468 CXF: Denial of service vulnerability in parsing JSON via JsonMapObjectReaderWriter 1974854 - CVE-2021-22118 spring-web: (re)creating the temporary storage directory could result in a privilege escalation within WebFlux application 1974891 - CVE-2021-34428 jetty: SessionListener can prevent a session from being invalidated breaking logout 1977362 - CVE-2021-3629 undertow: potential security issue in flow control over HTTP/2 may lead to DOS 1981527 - CVE-2021-30129 mina-sshd-core: Memory leak denial of service in Apache Mina SSHD Server 1991299 - CVE-2021-3690 undertow: buffer leak on incoming websocket PONG message may lead to DoS 1995259 - CVE-2021-37714 jsoup: Crafted input may cause the jsoup HTML and XML parser to get stuck 2004133 - CVE-2021-37136 netty-codec: Bzip2Decoder doesn't allow setting size restrictions for decompressed data 2004135 - CVE-2021-37137 netty-codec: SnappyFrameDecoder doesn't restrict chunk length and may buffer skippable chunks in an unnecessary way 2030932 - CVE-2021-44228 log4j-core: Remote code execution in Log4j 2.x when logs contain an attacker-controlled string value 5. Description: Red Hat AMQ Streams, based on the Apache Kafka project, offers a distributed backbone that allows microservices and other applications to share data with extremely high throughput and extremely low latency. Description: Red Hat JBoss Enterprise Application Platform 7 is a platform for Java applications based on the WildFly application runtime. This release of Red Hat JBoss Enterprise Application Platform 7.3.7 serves as a replacement for Red Hat JBoss Enterprise Application Platform 7.3.6, and includes bug fixes and enhancements. See the Red Hat JBoss Enterprise Application Platform 7.3.7 Release Notes for information about the most significant bug fixes and enhancements included in this release. Solution: Before applying this update, ensure all previously released errata relevant to your system have been applied. For details about how to apply this update, see: https://access.redhat.com/articles/11258 5. JIRA issues fixed (https://issues.jboss.org/): JBEAP-20478 - (7.3.z) Upgrade artemis-wildfly-integration from 1.0.2 to 1.0.4 JBEAP-20868 - Tracker bug for the EAP 7.3.7 release for RHEL-6 JBEAP-20927 - [GSS](7.3.z) Upgrade weld from 3.1.4.Final to 3.1.6.Final and weld-api to 3.1.0.SP3 JBEAP-20935 - [GSS](7.3.z) Upgrade generic jms from 2.0.8.Final-redhat-00001 to 2.0.9.Final-redhat-00001 JBEAP-20940 - (7.3.z) Upgrade WildFly Elytron from 1.10.11.Final-redhat-00001 to 1.10.12.Final-redhat-00001 JBEAP-21093 - [GSS] (7.3.z) Upgrade undertow from 2.0.34.SP1-redhat-00001 to 2.0.35.SP1-redhat-00001 JBEAP-21094 - (7.3.z) Upgrade WildFly Core from 10.1.18.Final-redhat-00001 to 10.1.19.Final-redhat-00001 JBEAP-21095 - [GSS](7.3.z) Upgrade HAL from 3.2.13.Final-redhat-00001 to 3.2.14.Final-redhat-00001 JBEAP-21096 - (7.3.z) (Core) Upgrade xalan from 2.7.1.jbossorg-2 to 2.7.1.jbossorg-5 JBEAP-21121 - (7.3.z) Upgrade wildfly-http-client from 1.0.25.Final-redhat-00001 to 1.0.26.Final-redhat-00001 JBEAP-21185 - [GSS](7.3.z) ISPN-12807 - Simple cache does not update eviction statistics JBEAP-21186 - [GSS](7.3.z) Upgrade Infinispan from 9.4.19.Final-redhat-00001 to 9.4.22.Final-redhat-00001 JBEAP-21193 - (7.3.z) Upgrade RESTEasy from 3.11.3.Final-redhat-00001 to 3.11.4.Final-redhat-00001 JBEAP-21196 - [GSS](7.3.z) Upgrade JBoss Marshalling from 2.0.10.Final to 2.0.11.Final JBEAP-21203 - [GSS](7.3.z) Upgrade jgroups-kubernetes from 1.0.13.Final to 1.0.16.Final JBEAP-21262 - [GSS](7.3.z) Upgrade yasson from 1.0.5.redhat-00001 to 1.0.9.redhat-00001 JBEAP-21279 - (7.3.z) Upgrade xalan from 2.7.1.redhat-12 to 2.7.1.redhat-13 JBEAP-21312 - [GSS](7.3.z) Upgrade Ironjacamar from 1.4.27 to 1.4.30 JBEAP-21322 - [GSS](7.3.z) 7.3 Update 6 patch breaks samesite-cookie in Undertow JBEAP-21351 - (7.3.z) Upgrade WildFly Core from 10.1.19.Final-redhat-00001 to 10.1.20.Final-redhat-00001 JBEAP-21390 - (7.3.z) Upgrade Bouncy Castle from 1.68.0.redhat-00001 to 1.68.0.redhat-00005 JBEAP-21479 - (7.3.z) Upgrade mod_cluster from 1.4.3.Final-redhat-00001 to 1.4.3.Final-redhat-00002 7. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 8. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Moderate: EAP XP 2 security update to CVE fixes in the EAP 7.3.x base Advisory ID: RHSA-2021:2755-01 Product: Red Hat JBoss Enterprise Application Platform Advisory URL: https://access.redhat.com/errata/RHSA-2021:2755 Issue date: 2021-07-15 CVE Names: CVE-2020-13936 CVE-2020-15522 CVE-2020-28052 CVE-2021-3536 CVE-2021-20220 CVE-2021-20250 CVE-2021-21290 CVE-2021-21295 CVE-2021-21409 ==================================================================== 1. Summary: This advisory resolves CVE issues filed against XP2 releases that have been fixed in the underlying EAP 7.3.x base. There are no changes to the EAP XP2 code base. NOTE: This advisory is informational only. There are no code changes associated with it. No action is required. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Description: These are CVE issues filed against XP2 releases that have been fixed in the underlying EAP 7.3.x base, so no changes to the EAP XP2 code base. Security Fix(es): * velocity: arbitrary code execution when attacker is able to modify templates (CVE-2020-13936) * bouncycastle: password bypass in OpenBSDBCrypt.checkPassword utility possible (CVE-2020-28052) * bouncycastle: Timing issue within the EC math library (CVE-2020-15522) * undertow: Possible regression in fix for CVE-2020-10687 (CVE-2021-20220) * wildfly: Information disclosure due to publicly accessible privileged actions in JBoss EJB Client (CVE-2021-20250) * netty: Information disclosure via the local system temporary directory (CVE-2021-21290) * netty: possible request smuggling in HTTP/2 due missing validation (CVE-2021-21295) * netty: Request smuggling via content-length header (CVE-2021-21409) * wildfly: XSS via admin console when creating roles in domain mode (CVE-2021-3536) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. 3. Solution: This advisory is informational only. There are no code changes associated with it. No action is required. 4. Bugs fixed (https://bugzilla.redhat.com/): 1912881 - CVE-2020-28052 bouncycastle: password bypass in OpenBSDBCrypt.checkPassword utility possible 1923133 - CVE-2021-20220 undertow: Possible regression in fix for CVE-2020-10687 1927028 - CVE-2021-21290 netty: Information disclosure via the local system temporary directory 1929479 - CVE-2021-20250 wildfly: Information disclosure due to publicly accessible privileged actions in JBoss EJB Client 1937364 - CVE-2021-21295 netty: possible request smuggling in HTTP/2 due missing validation 1937440 - CVE-2020-13936 velocity: arbitrary code execution when attacker is able to modify templates 1944888 - CVE-2021-21409 netty: Request smuggling via content-length header 1948001 - CVE-2021-3536 wildfly: XSS via admin console when creating roles in domain mode 1962879 - CVE-2020-15522 bouncycastle: Timing issue within the EC math library 5. JIRA issues fixed (https://issues.jboss.org/): JBEAP-22122 - XP 2.0.0 respin (2.0.0-7.3.8.GA) 6. References: https://access.redhat.com/security/cve/CVE-2020-13936 https://access.redhat.com/security/cve/CVE-2020-15522 https://access.redhat.com/security/cve/CVE-2020-28052 https://access.redhat.com/security/cve/CVE-2021-3536 https://access.redhat.com/security/cve/CVE-2021-20220 https://access.redhat.com/security/cve/CVE-2021-20250 https://access.redhat.com/security/cve/CVE-2021-21290 https://access.redhat.com/security/cve/CVE-2021-21295 https://access.redhat.com/security/cve/CVE-2021-21409 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.3/ https://access.redhat.com/articles/5975301 7. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYPBTitzjgjWX9erEAQjULQ//dqoecZtz+8zCi1Ol+lvRNTDUSiLzYCr8 Z0A3cH+s0WmMPNZiM2yZ/oykjD3ANDckf4KEBdh+ONtYGBXQKyW7VUBZVJxw6uk8 5mZMM/KlIOSPsL2LdYnnIC1OHw971Sq2hzwqWWKkMLPjOHyi1LcTfY4doFIBbRb/ njy+/dXVgZzUOJLb5Fk4/1PiXFKlTLc2+hNCpBkZGr4bgOaMChQIo/bp9xltMyQx o+Tj23ipS4FNsyLOWJ4LLAfhNMX8UycHZxbyferFmSvBH35cw+dzi7YIvh8m/WeP QIxa9ag1p0Tk9fFwLwP5OnCTCCh0ITixJanqTENUuJvjTZ0BqWICssWPpoqd4REt UvulVEQfNY34Gjs2ivYlBFuKiZoOTDQiQHtaUiAlTBln14ppRDyCyDNV9YdatPQZ NzNTEzvZbthKGdF8eW6epLWy6YFWUhXyF6SQRk20pyJZ4Aqr3MioCjnU1XjX4lks VUnDBkJiY6f+TLwosSQojdBle/g9QFubvA+wG/ZpGVyI5Z194fWRwjZGEBTtwYTY +KoVjP9iTu/y2N0nj6Mtj9tAAUiwuR4QA7qDA7fG8BsL36lQCRIDSMKd3/xOS0f9 S1GtgSkLjWYcCUkGGRdmFwkVQc7GSMYV7Ysy+wOJYPsrSNcgbRhUZW4EdErPbH5t O9QuLVofSBU=j6f5 -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce . Installation instructions for your platform are available from https://access.redhat.com. Dockerfiles and scripts should be amended either to refer to this new image specifically, or to the latest image generally. Relevant releases/architectures: 7Client-AMQ-Clients-2 - noarch, x86_64 7ComputeNode-AMQ-Clients-2 - noarch, x86_64 7Server-AMQ-Clients-2 - noarch, x86_64 7Workstation-AMQ-Clients-2 - noarch, x86_64 8Base-AMQ-Clients-2 - noarch, x86_64 3. Description: Red Hat AMQ Clients enable connecting, sending, and receiving messages over the AMQP 1.0 wire transport protocol to or from AMQ Broker 6 and 7. Solution: Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on. The References section of this erratum contains a download link for the update. You must be logged in to download the update

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

environmental issue

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Red Hat

SOURCES

LAST UPDATE DATE

2026-08-13T20:27:05.907000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE