Bug 741570 (CVE-2020-1968)

Summary:	<dev-libs/openssl-1.1.1: Weakness in TLS protocol (Raccoon attack) (CVE-2020-1968)
Product:	Gentoo Security	Reporter:	Sam James <sam>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	RESOLVED FIXED
Severity:	normal	CC:	base-system
Priority:	Normal	Keywords:	PullRequest
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	https://www.openssl.org/news/secadv/20200909.txt
See Also:	https://github.com/gentoo/gentoo/pull/22909
Whiteboard:	A3 [glsa+]
Package list:		Runtime testing required:	---
Bug Depends on:	741616
Bug Blocks:

Description Sam James archtester

2020-09-11 02:52:52 UTC

Description:
"The Raccoon attack exploits a flaw in the TLS specification which can lead to an attacker being able to compute the pre-master secret in connections which have used a Diffie-Hellman (DH) based ciphersuite. In such a case this would result in the attacker being able to eavesdrop on all encrypted communications sent over that TLS connection. The attack can only be exploited if an implementation re-uses a DH secret across multiple TLS connections. Note that this issue only impacts DH ciphersuites and not ECDH ciphersuites. 

This issue affects OpenSSL 1.0.2 which is out of support and no longer receiving public updates. OpenSSL 1.1.1 is not vulnerable to this issue. Fixed in OpenSSL 1.0.2w (Affected 1.0.2-1.0.2v)."

Comment 1 Thomas Deutschmann (RETIRED) gentoo-dev

2020-09-11 08:10:03 UTC

It only affects <1.1 but as long as we have this version is repository we are affected.

Updated summary to reflect current status in Gentoo.

Comment 2 John Helmert III archtester

2022-10-14 03:39:22 UTC

GLSA request filed

Comment 3 Larry the Git Cow gentoo-dev

2022-10-16 14:39:44 UTC

The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/data/glsa.git/commit/?id=143e8d174e14e346f2c37e8a31a4be211ac3e24c

commit 143e8d174e14e346f2c37e8a31a4be211ac3e24c
Author:     GLSAMaker <glsamaker@gentoo.org>
AuthorDate: 2022-10-16 14:27:07 +0000
Commit:     John Helmert III <ajak@gentoo.org>
CommitDate: 2022-10-16 14:39:36 +0000

    [ GLSA 202210-02 ] OpenSSL: Multiple Vulnerabilities
    
    Bug: https://bugs.gentoo.org/741570
    Bug: https://bugs.gentoo.org/809980
    Bug: https://bugs.gentoo.org/832339
    Bug: https://bugs.gentoo.org/835343
    Bug: https://bugs.gentoo.org/842489
    Bug: https://bugs.gentoo.org/856592
    Bug: https://bugs.gentoo.org/876787
    Signed-off-by: GLSAMaker <glsamaker@gentoo.org>
    Signed-off-by: John Helmert III <ajak@gentoo.org>

 glsa-202210-02.xml | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)

Comment 4 Larry the Git Cow gentoo-dev

2022-10-16 14:52:40 UTC

The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=530086715f82de12009538347725dbfd14e6b0a8

commit 530086715f82de12009538347725dbfd14e6b0a8
Author:     John Helmert III <ajak@gentoo.org>
AuthorDate: 2022-10-14 03:47:09 +0000
Commit:     John Helmert III <ajak@gentoo.org>
CommitDate: 2022-10-16 14:52:19 +0000

    profiles: mask <openssl-1.1.1
    
    Bug: https://bugs.gentoo.org/876787
    Bug: https://bugs.gentoo.org/741570
    Bug: https://bugs.gentoo.org/809980
    Bug: https://bugs.gentoo.org/832339
    Bug: https://bugs.gentoo.org/835343
    Bug: https://bugs.gentoo.org/842489
    Bug: https://bugs.gentoo.org/856592
    Closes: https://github.com/gentoo/gentoo/pull/22909
    Signed-off-by: John Helmert III <ajak@gentoo.org>

 profiles/package.mask | 5 +++++
 1 file changed, 5 insertions(+)

Comment 5 John Helmert III archtester

2022-10-16 14:56:11 UTC

GLSA released, all done!