1983596 – (CVE-2021-34558) CVE-2021-34558 golang: crypto/tls: certificate of wrong type is causing TLS client to panic

Bug 1983596 (CVE-2021-34558) - CVE-2021-34558 golang: crypto/tls: certificate of wrong type is causing TLS client to panic

Summary: CVE-2021-34558 golang: crypto/tls: certificate of wrong type is causing TLS c...

Keywords:
Status:	CLOSED ERRATA
Alias:	CVE-2021-34558
Product:	Security Response
Classification:	Other
Component:	vulnerability
Sub Component:
Version:	unspecified
Hardware:	All
OS:	Linux
Priority:	medium
Severity:	medium
Target Milestone:	---
Assignee:	Red Hat Product Security
QA Contact:
Docs Contact:
URL:
Whiteboard:
Depends On:	1991407 1983597 1985568 1985569 1986037 1986041 1986042 1986043 1986044 1986045 1986046 1986047 1986048 1986049 1986050 1986056 1986057 1986069 1986070 1986071 1986072 1986073 1986079 1986082 1986084 1986197 1986198 1986199 1986200 1986203 1986204 1986242 1986415 1986571 1986975 1986976 1987212 1987213 1987214 1987215 1987737 1987738 1987739 1987740 1987741 1987742 1987791 1987793 1987794 1987810 1987832 1989219 1989241 1989242 1989243 1989244 1989313 1989314 1989315 1989316 1990702 1990714 1990715 1990716 1990717 1990718 1990719 1991364 1991365 1991366 1991367 1991368 1991369 1991370 1991371 1991372 1991373 1991374 1991375 1991376 1991377 1991378 1991379 1991380 1991381 1991382 1991383 1991384 1991385 1991386 1991387 1991388 1991389 1991390 1991391 1991392 1991393 1991394 1991395 1991396 1991397 1991398 1991399 1991400 1991401 1991402 1991403 1991404 1991405 1991406 1991408 1991409 1991410 1991411 1991412 1991413 1991414 1991415 1991416 1991417 1991418 1991419 1991420 1991421 1991422 1991437 1992001 1992002 1992003 1992018 1992019 1992020 1992021 1992022 1992023 1992024 1992025 1992026 1992027 1992028 1992029 1992030 1992031 1992032 1992033 1992034 1992035 1992036 1992037 1992038 1992039 1992040 1992041 1992042 1992043 1992044 1992045 1992046 1992047 1992048 1992049 1992050 1992051 1992055 1992056 1992057 1992058 1992059 1992060 1992061 1992062 1992063 1992064 1992065 1992066 1992067 1992068 1992069 1992070 1992071 1992072 1992073 1992074 1992075 1992076 1992077 1992078 1992079 1992080 1992081 1992082 1992083 1992084 1992085 1992259 1992260 1992261 1992269 1999378 1999379 2005078 2057521
Blocks:	1983600
TreeView+	depends on / blocked

Reported:	2021-07-19 07:54 UTC by Dhananjay Arunesh
Modified:	2023-10-17 11:26 UTC (History)
CC List:	158 users (show)
Fixed In Version:	golang 1.17.0, golang 1.16.6, golang 1.15.14
Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in golang. A panic can be triggered by an attacker in a privileged network position without access to the server certificate's private key, as long as a trusted ECDSA or Ed25519 certificate for the server exists (or can be issued), or the client is configured with Config.InsecureSkipVerify. Clients that disable all TLS_RSA cipher suites (that is, TLS 1.0–1.2 cipher suites without ECDHE), as well as TLS 1.3-only clients, are unaffected.
Clone Of:
Environment:
Last Closed:	2021-08-06 01:07:38 UTC
Embargoed:

Attachments	(Terms of Use)

Links
System	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2021:2983	None	None	None	2021-08-10 11:27:02 UTC
Red Hat Product Errata	RHSA-2021:2984	None	None	None	2021-08-10 07:50:17 UTC
Red Hat Product Errata	RHSA-2021:3009	None	None	None	2021-08-12 00:38:39 UTC
Red Hat Product Errata	RHSA-2021:3015	None	None	None	2021-08-05 09:00:46 UTC
Red Hat Product Errata	RHSA-2021:3076	None	None	None	2021-08-10 13:58:22 UTC
Red Hat Product Errata	RHSA-2021:3146	None	None	None	2021-08-12 01:35:01 UTC
Red Hat Product Errata	RHSA-2021:3229	None	None	None	2021-08-19 12:34:00 UTC
Red Hat Product Errata	RHSA-2021:3248	None	None	None	2021-08-31 14:59:32 UTC
Red Hat Product Errata	RHSA-2021:3259	None	None	None	2021-08-24 12:49:04 UTC
Red Hat Product Errata	RHSA-2021:3361	None	None	None	2021-08-31 08:09:43 UTC
Red Hat Product Errata	RHSA-2021:3555	None	None	None	2021-09-16 15:21:51 UTC
Red Hat Product Errata	RHSA-2021:3556	None	None	None	2021-09-16 18:39:42 UTC
Red Hat Product Errata	RHSA-2021:3598	None	None	None	2021-09-21 11:06:18 UTC
Red Hat Product Errata	RHSA-2021:3733	None	None	None	2021-10-05 17:35:45 UTC
Red Hat Product Errata	RHSA-2021:3759	None	None	None	2021-10-18 17:28:40 UTC
Red Hat Product Errata	RHSA-2021:3820	None	None	None	2021-10-19 20:20:54 UTC
Red Hat Product Errata	RHSA-2021:4104	None	None	None	2021-11-02 15:57:11 UTC
Red Hat Product Errata	RHSA-2021:4226	None	None	None	2021-11-09 17:49:14 UTC
Red Hat Product Errata	RHSA-2021:4582	None	None	None	2021-11-10 11:54:42 UTC
Red Hat Product Errata	RHSA-2021:4722	None	None	None	2021-11-17 15:35:44 UTC
Red Hat Product Errata	RHSA-2021:4725	None	None	None	2021-11-17 18:39:55 UTC
Red Hat Product Errata	RHSA-2021:4914	None	None	None	2021-12-02 17:00:45 UTC
Red Hat Product Errata	RHSA-2021:5085	None	None	None	2021-12-13 15:26:37 UTC
Red Hat Product Errata	RHSA-2021:5086	None	None	None	2021-12-13 17:44:01 UTC
Red Hat Product Errata	RHSA-2022:0191	None	None	None	2022-01-19 17:49:40 UTC
Red Hat Product Errata	RHSA-2022:0237	None	None	None	2022-01-24 13:51:02 UTC
Red Hat Product Errata	RHSA-2022:0260	None	None	None	2022-01-25 13:53:33 UTC
Red Hat Product Errata	RHSA-2022:0577	None	None	None	2022-03-28 09:36:01 UTC
Red Hat Product Errata	RHSA-2022:0947	None	None	None	2022-03-16 15:47:50 UTC
Red Hat Product Errata	RHSA-2022:0988	None	None	None	2022-03-24 10:58:13 UTC
Red Hat Product Errata	RHSA-2022:0998	None	None	None	2022-03-23 22:27:18 UTC
Red Hat Product Errata	RHSA-2022:1329	None	None	None	2022-04-12 15:07:59 UTC
Red Hat Product Errata	RHSA-2022:1372	None	None	None	2022-04-13 18:49:16 UTC
Red Hat Product Errata	RHSA-2022:7954	None	None	None	2022-11-15 09:47:50 UTC

Description Dhananjay Arunesh 2021-07-19 07:54:01 UTC

crypto/tls clients can panic when provided a certificate of the wrong type for the negotiated parameters. net/http clients performing HTTPS requests are also affected. The panic can be triggered by an attacker in a privileged network position without access to the server certificate's private key, as long as a trusted ECDSA or Ed25519 certificate for the server exists (or can be issued), or the client is configured with Config.InsecureSkipVerify. Clients that disable all TLS_RSA cipher suites (that is, TLS 1.0–1.2 cipher suites without ECDHE), as well as TLS 1.3-only clients, are unaffected.

References:
https://golang.org/doc/devel/release
https://github.com/golang/go/issues/47145
https://github.com/golang/go/issues/47144

Comment 1 Dhananjay Arunesh 2021-07-19 07:54:35 UTC

Created golang tracking bugs for this issue:

Affects: fedora-all [bug 1983597]

Comment 10 Todd Cullum 2021-07-26 22:30:26 UTC

Created golang tracking bugs for this issue:

Affects: epel-7 [bug 1986200]

Comment 25 Todd Cullum 2021-07-29 16:03:34 UTC

Created buildah tracking bugs for this issue:

Affects: fedora-all [bug 1987738]


Created containernetworking-plugins tracking bugs for this issue:

Affects: fedora-all [bug 1987737]


Created podman tracking bugs for this issue:

Affects: fedora-all [bug 1987739]

Comment 29 Todd Cullum 2021-07-29 16:29:56 UTC

Created runc tracking bugs for this issue:

Affects: fedora-all [bug 1987832]

Comment 31 Todd Cullum 2021-07-29 16:57:17 UTC

Flaw summary:

Code in golang's crypto/tls/key_agreement.go in the generateClientKeyExchange() routine, which is used in the TLS handshake, made an assumption that the provided certificate's public key was of the correct type for TLS_RSA cipher suites:


	encrypted, err := rsa.EncryptPKCS1v15(config.rand(), cert.PublicKey.(*rsa.PublicKey), preMasterSecret)

The patch fixes the issue by first checking for errors when processing the provided public key from the X509 certificate, then if and only if no errors exist, it will begin the encryption process:

	rsaKey, ok := cert.PublicKey.(*rsa.PublicKey)
	if !ok {
		return nil, nil, errors.New("tls: server certificate contains incorrect key type for selected ciphersuite")
	}
	encrypted, err := rsa.EncryptPKCS1v15(config.rand(), rsaKey, preMasterSecret)

Comment 39 errata-xmlrpc 2021-08-05 09:00:39 UTC

This issue has been addressed in the following products:

  Red Hat Developer Tools

Via RHSA-2021:3015 https://access.redhat.com/errata/RHSA-2021:3015

Comment 40 Product Security DevOps Team 2021-08-05 13:07:02 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-34558

Comment 43 Product Security DevOps Team 2021-08-06 01:07:38 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-34558

Comment 48 errata-xmlrpc 2021-08-10 07:50:10 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.8

Via RHSA-2021:2984 https://access.redhat.com/errata/RHSA-2021:2984

Comment 49 errata-xmlrpc 2021-08-10 11:26:55 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.8

Via RHSA-2021:2983 https://access.redhat.com/errata/RHSA-2021:2983

Comment 50 errata-xmlrpc 2021-08-10 13:58:16 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:3076 https://access.redhat.com/errata/RHSA-2021:3076

Comment 58 errata-xmlrpc 2021-08-12 00:38:33 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.6

Via RHSA-2021:3009 https://access.redhat.com/errata/RHSA-2021:3009

Comment 59 errata-xmlrpc 2021-08-12 01:34:55 UTC

This issue has been addressed in the following products:

  RHACS-3.64-RHEL-8

Via RHSA-2021:3146 https://access.redhat.com/errata/RHSA-2021:3146

Comment 62 errata-xmlrpc 2021-08-19 12:33:53 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Jaeger 1.20

Via RHSA-2021:3229 https://access.redhat.com/errata/RHSA-2021:3229

Comment 63 ximhan 2021-08-20 07:44:34 UTC

OpenShift engineering has decided to NOT ship 4.8.6 on 8/23 due to the following issue.
https://bugzilla.redhat.com/show_bug.cgi?id=1995785
All the fixes part will be now included in 4.8.7 on 8/30.

Comment 65 errata-xmlrpc 2021-08-24 12:48:57 UTC

This issue has been addressed in the following products:

  RHEL-8-CNV-4.8

Via RHSA-2021:3259 https://access.redhat.com/errata/RHSA-2021:3259

Comment 67 errata-xmlrpc 2021-08-31 08:09:38 UTC

This issue has been addressed in the following products:

  Red Hat Migration Toolkit for Containers 1.5

Via RHSA-2021:3361 https://access.redhat.com/errata/RHSA-2021:3361

Comment 68 errata-xmlrpc 2021-08-31 14:59:27 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.8

Via RHSA-2021:3248 https://access.redhat.com/errata/RHSA-2021:3248

Comment 69 errata-xmlrpc 2021-09-16 15:21:44 UTC

This issue has been addressed in the following products:

  Openshift Serverless 1 on RHEL 8

Via RHSA-2021:3555 https://access.redhat.com/errata/RHSA-2021:3555

Comment 70 errata-xmlrpc 2021-09-16 18:39:37 UTC

This issue has been addressed in the following products:

  Openshift Serveless 1.17

Via RHSA-2021:3556 https://access.redhat.com/errata/RHSA-2021:3556

Comment 71 errata-xmlrpc 2021-09-21 11:06:10 UTC

This issue has been addressed in the following products:

  RHEL-8-CNV-4.8

Via RHSA-2021:3598 https://access.redhat.com/errata/RHSA-2021:3598

Comment 73 errata-xmlrpc 2021-10-05 17:35:39 UTC

This issue has been addressed in the following products:

  RHEL-8-CNV-2.6

Via RHSA-2021:3733 https://access.redhat.com/errata/RHSA-2021:3733

Comment 76 errata-xmlrpc 2021-10-18 17:28:35 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.9

Via RHSA-2021:3759 https://access.redhat.com/errata/RHSA-2021:3759

Comment 77 errata-xmlrpc 2021-10-19 20:20:46 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.8

Via RHSA-2021:3820 https://access.redhat.com/errata/RHSA-2021:3820

Comment 78 errata-xmlrpc 2021-11-02 15:57:05 UTC

This issue has been addressed in the following products:

  RHEL-8-CNV-4.9

Via RHSA-2021:4104 https://access.redhat.com/errata/RHSA-2021:4104

Comment 79 errata-xmlrpc 2021-11-09 17:49:07 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4226 https://access.redhat.com/errata/RHSA-2021:4226

Comment 80 errata-xmlrpc 2021-11-10 11:54:35 UTC

This issue has been addressed in the following products:

  Service Telemetry Framework 1.3 for RHEL 8

Via RHSA-2021:4582 https://access.redhat.com/errata/RHSA-2021:4582

Comment 85 errata-xmlrpc 2021-11-17 15:35:37 UTC

This issue has been addressed in the following products:

  RHEL-8-CNV-2.6
  RHEL-7-CNV-2.6

Via RHSA-2021:4722 https://access.redhat.com/errata/RHSA-2021:4722

Comment 86 errata-xmlrpc 2021-11-17 18:39:50 UTC

This issue has been addressed in the following products:

  RHEL-8-CNV-2.6

Via RHSA-2021:4725 https://access.redhat.com/errata/RHSA-2021:4725

Comment 88 errata-xmlrpc 2021-12-02 17:00:40 UTC

This issue has been addressed in the following products:

  RHEL-8-CNV-4.8

Via RHSA-2021:4914 https://access.redhat.com/errata/RHSA-2021:4914

Comment 89 errata-xmlrpc 2021-12-13 15:26:32 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Data Foundation 4.9.0 on RHEL-8

Via RHSA-2021:5085 https://access.redhat.com/errata/RHSA-2021:5085

Comment 90 errata-xmlrpc 2021-12-13 17:43:55 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Data Foundation 4.9.0 on RHEL-8

Via RHSA-2021:5086 https://access.redhat.com/errata/RHSA-2021:5086

Comment 91 errata-xmlrpc 2022-01-19 17:49:35 UTC

This issue has been addressed in the following products:

  RHEL-8-CNV-4.9

Via RHSA-2022:0191 https://access.redhat.com/errata/RHSA-2022:0191

Comment 92 errata-xmlrpc 2022-01-24 13:50:55 UTC

This issue has been addressed in the following products:

  Red Hat OpenStack Platform 16.2

Via RHSA-2022:0237 https://access.redhat.com/errata/RHSA-2022:0237

Comment 93 errata-xmlrpc 2022-01-25 13:53:26 UTC

This issue has been addressed in the following products:

  Red Hat OpenStack Platform 16.1

Via RHSA-2022:0260 https://access.redhat.com/errata/RHSA-2022:0260

Comment 94 errata-xmlrpc 2022-03-16 15:47:43 UTC

This issue has been addressed in the following products:

  RHEL-8-CNV-4.10

Via RHSA-2022:0947 https://access.redhat.com/errata/RHSA-2022:0947

Comment 95 errata-xmlrpc 2022-03-23 22:27:11 UTC

This issue has been addressed in the following products:

  Red Hat OpenStack Platform 16.2

Via RHSA-2022:0998 https://access.redhat.com/errata/RHSA-2022:0998

Comment 96 errata-xmlrpc 2022-03-24 10:58:08 UTC

This issue has been addressed in the following products:

  Red Hat OpenStack Platform 16.1

Via RHSA-2022:0988 https://access.redhat.com/errata/RHSA-2022:0988

Comment 97 errata-xmlrpc 2022-03-28 09:35:55 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.10

Via RHSA-2022:0577 https://access.redhat.com/errata/RHSA-2022:0577

Comment 98 errata-xmlrpc 2022-04-12 15:07:49 UTC

This issue has been addressed in the following products:

  RHEL-8-CNV-4.8
  RHEL-7-CNV-4.8

Via RHSA-2022:1329 https://access.redhat.com/errata/RHSA-2022:1329

Comment 99 errata-xmlrpc 2022-04-13 18:49:08 UTC

This issue has been addressed in the following products:

  RHODF-4.10-RHEL-8

Via RHSA-2022:1372 https://access.redhat.com/errata/RHSA-2022:1372

Comment 101 errata-xmlrpc 2022-11-15 09:47:45 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2022:7954 https://access.redhat.com/errata/RHSA-2022:7954

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