Bug 2139327 (CVE-2022-3821) - CVE-2022-3821 systemd: buffer overrun in format_timespan() function
Summary: CVE-2022-3821 systemd: buffer overrun in format_timespan() function
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2022-3821
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2139355 2139388 2139389 2139390 2139391 2139392 2142954
Blocks: 2137787 2140981
TreeView+ depends on / blocked
 
Reported: 2022-11-02 07:54 UTC by TEJ RATHI
Modified: 2023-12-07 15:28 UTC (History)
43 users (show)

Fixed In Version: systemd 251-stable, systemd 252-rc1
Doc Type: If docs needed, set a value
Doc Text:
An off-by-one error flaw was found in systemd in the format_timespan() function of time-util.c. This flaw allows an attacker to supply specific values for time and accuracy, leading to a buffer overrun in format_timespan(), leading to a denial of service.
Clone Of:
Environment:
Last Closed: 2023-01-25 14:22:32 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2023:0100 0 None None None 2023-01-12 09:19:04 UTC
Red Hat Product Errata RHSA-2023:0336 0 None None None 2023-01-23 15:21:48 UTC

Description TEJ RATHI 2022-11-02 07:54:19 UTC 
Systemd: The format_timespan function in time-util.c triggers buffer overrun with crafted time values. Supplying specific values for time and accuracy leads to buffer overrun in format_timespan, leading to Denial of Service.

References:
https://github.com/systemd/systemd/issues/23928
https://github.com/systemd/systemd/pull/23933
https://github.com/systemd/systemd/commit/9102c625a673a3246d7e73d8737f3494446bad4e
Comment 1 TEJ RATHI 2022-11-02 09:44:37 UTC 
Created systemd tracking bugs for this issue:

Affects: fedora-all [bug 2139355]
Comment 9 juneau 2022-11-15 16:03:49 UTC 
Created systemd tracking bugs for this issue:

Affects: fedora-all [bug 2142954]
Comment 14 errata-xmlrpc 2023-01-12 09:19:00 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:0100 https://access.redhat.com/errata/RHSA-2023:0100
Comment 15 errata-xmlrpc 2023-01-23 15:21:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:0336 https://access.redhat.com/errata/RHSA-2023:0336
Comment 16 Product Security DevOps Team 2023-01-25 14:22:28 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-2022-3821
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