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Bug 792270 (CVE-2021-31924, YSA-2021-03)

Summary: <sys-auth/pam_u2f-1.1.1: Local PIN bypass (CVE-2021-31924)
Product: Gentoo Security Reporter: Sam James <sam>
Component: VulnerabilitiesAssignee: Gentoo Security <security>
Status: RESOLVED FIXED    
Severity: minor CC: gokturk
Priority: Normal Flags: nattka: sanity-check+
Version: unspecified   
Hardware: All   
OS: Linux   
URL: https://www.yubico.com/support/security-advisories/ysa-2021-03/
Whiteboard: B3 [glsa+]
Package list:
sys-auth/pam_u2f-1.1.1
Runtime testing required: ---

Description Sam James archtester Gentoo Infrastructure gentoo-dev Security 2021-05-26 16:46:19 UTC
Description:
"Yubico pam-u2f before 1.1.1 has a logic issue that, depending on the pam-u2f configuration and the application used, could lead to a local PIN bypass. This issue does not allow user presence (touch) or cryptographic signature verification to be bypassed, so an attacker would still need to physically possess and interact with the YubiKey or another enrolled authenticator. If pam-u2f is configured to require PIN authentication, and the application using pam-u2f allows the user to submit NULL as the PIN, pam-u2f will attempt to perform a FIDO2 authentication without PIN. If this authentication is successful, the PIN requirement is bypassed."
Comment 1 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2021-05-26 16:46:55 UTC
Please bump to 1.1.1.
Comment 2 Larry the Git Cow gentoo-dev 2021-06-01 18:27:00 UTC
The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=61975a03862b41f57868867e8aeec85643aa4c94

commit 61975a03862b41f57868867e8aeec85643aa4c94
Author:     David Seifert <soap@gentoo.org>
AuthorDate: 2021-06-01 18:26:45 +0000
Commit:     David Seifert <soap@gentoo.org>
CommitDate: 2021-06-01 18:26:45 +0000

    sys-auth/pam_u2f: add 1.1.1
    
    Bug: https://bugs.gentoo.org/792270
    Signed-off-by: David Seifert <soap@gentoo.org>

 sys-auth/pam_u2f/Manifest             |  1 +
 sys-auth/pam_u2f/pam_u2f-1.1.1.ebuild | 39 +++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)
Comment 3 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2021-06-21 07:08:22 UTC
Ready?
Comment 4 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2021-06-25 01:19:57 UTC
I'll CC arches if no objections?
Comment 5 Agostino Sarubbo gentoo-dev 2021-06-27 05:57:44 UTC
amd64 stable
Comment 6 Agostino Sarubbo gentoo-dev 2021-06-27 05:58:28 UTC
x86 stable.

Maintainer(s), please cleanup.
Security, please vote.
Comment 7 Larry the Git Cow gentoo-dev 2021-07-26 03:24:57 UTC
The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=1244305b9284cf3cf0527fdac223920a5de8fde9

commit 1244305b9284cf3cf0527fdac223920a5de8fde9
Author:     John Helmert III <ajak@gentoo.org>
AuthorDate: 2021-07-25 20:33:06 +0000
Commit:     John Helmert III <ajak@gentoo.org>
CommitDate: 2021-07-26 03:12:43 +0000

    sys-auth/pam_u2f: drop 1.1.0
    
    Bug: https://bugs.gentoo.org/792270
    Signed-off-by: John Helmert III <ajak@gentoo.org>

 sys-auth/pam_u2f/Manifest                          |  1 -
 .../pam_u2f/files/pam_u2f-1.0.2-fix-Makefile.patch | 13 -------
 .../files/pam_u2f-1.1.0-include-limits_h.patch     | 41 ----------------------
 sys-auth/pam_u2f/pam_u2f-1.1.0.ebuild              | 37 -------------------
 4 files changed, 92 deletions(-)
Comment 8 John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2022-08-09 21:16:56 UTC
GLSA request filed.
Comment 9 Larry the Git Cow gentoo-dev 2022-08-10 04:18:21 UTC
The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/data/glsa.git/commit/?id=32b3e4980186cdbe7f79d215b0fea80008a41a94

commit 32b3e4980186cdbe7f79d215b0fea80008a41a94
Author:     GLSAMaker <glsamaker@gentoo.org>
AuthorDate: 2022-08-10 04:07:59 +0000
Commit:     John Helmert III <ajak@gentoo.org>
CommitDate: 2022-08-10 04:17:32 +0000

    [ GLSA 202208-11 ] Yubico pam-u2f: Local PIN Bypass vulnerability
    
    Bug: https://bugs.gentoo.org/792270
    Signed-off-by: GLSAMaker <glsamaker@gentoo.org>
    Signed-off-by: John Helmert III <ajak@gentoo.org>

 glsa-202208-11.xml | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
Comment 10 John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2022-08-10 04:23:31 UTC
GLSA released, all done!