Bug 2140224

Summary:	CVE-2022-43995 sudo: heap-based overflow with very small passwords [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Marco Benatto <mbenatto>
Component:	sudo	Assignee:	Radovan Sroka <rsroka>
Status:	CLOSED NOTABUG	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	36	CC:	alakatos, augenauf, awilliam, kzak, mattdm, robatino, rsroka, tosykora, zfridric
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-11-07 16:49:26 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Marco Benatto 2022-11-04 20:44:02 UTC

More information about this security flaw is available in the following bug:

http://bugzilla.redhat.com/show_bug.cgi?id=2139911

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Comment 1 Marco Benatto 2022-11-04 20:44:04 UTC

Use the following template to for the 'fedpkg update' request to submit an
update for this issue as it contains the top-level parent bug(s) as well as
this tracking bug.  This will ensure that all associated bugs get updated
when new packages are pushed to stable.

=====

# bugfix, security, enhancement, newpackage (required)
type=security

# low, medium, high, urgent (required)
severity=high

# testing, stable
request=testing

# Bug numbers: 1234,9876
bugs=2139911,2140224

# Description of your update
notes=Security fix for [PUT CVEs HERE]

# Enable request automation based on the stable/unstable karma thresholds
autokarma=True
stable_karma=3
unstable_karma=-3

# Automatically close bugs when this marked as stable
close_bugs=True

# Suggest that users restart after update
suggest_reboot=False

======

Additionally, you may opt to use the bodhi web interface to submit updates:

https://bodhi.fedoraproject.org/updates/new

Comment 2 Fedora Blocker Bugs Application 2022-11-07 11:08:53 UTC

Proposed as a Blocker for 37-final by Fedora user frantisekz using the blocker tracking app because:

 The release must contain no known security bugs of 'important' or higher impact according to the Red Hat severity classification scale which cannot be satisfactorily resolved by a package update (e.g. issues during installation).

Is this satisfactorily resolved by a package update? Probably, proposing up for discussion.

Also, impact is unclear, according to https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?name=CVE-2022-43995&vector=AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H&version=3.1&source=NIST : 
- Confidentiality Impact (C)*: High
- Integrity Impact (I)*: None
- Availability Impact (A)*: High

Comment 3 Flo 2022-11-07 13:53:20 UTC

Is Fedora even affected by this bug? I am asking because Ubuntu states [1] that "sudo packages in Ubuntu are compiled with PAM support, so the
vulnerable code isn't part of the binaries."

I think the same is true for Fedora, see spec file [2].

[1]: https://ubuntu.com/security/CVE-2022-43995
[2]: https://src.fedoraproject.org/rpms/sudo/blob/f37/f/sudo.spec

Comment 4 Radovan Sroka 2022-11-07 14:33:12 UTC

Hello,

this bugzilla is not relevant to fedora. We are not affected by this, can we close it?

Comment 5 Adam Williamson 2022-11-07 16:49:26 UTC

I confirmed on my own reading that the affected code is not built in Fedora's sudo. Closing.