Bug 2182199 (CVE-2023-1667) - CVE-2023-1667 libssh: NULL pointer dereference during rekeying with algorithm guessing
Summary: CVE-2023-1667 libssh: NULL pointer dereference during rekeying with algorithm...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2023-1667
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: 2182202 2182249 2182250 2182251 2182252 2189968 2196098 2196099
Blocks: 2182200
TreeView+ depends on / blocked
 
Reported: 2023-03-27 21:16 UTC by Pedro Sampaio
Modified: 2024-03-18 13:11 UTC (History)
28 users (show)

Fixed In Version: libssh 0.10.5, libssh 0.9.7
Doc Type: If docs needed, set a value
Doc Text:
A NULL pointer dereference was found In libssh during re-keying with algorithm guessing. This issue may allow an authenticated client to cause a denial of service.
Clone Of:
Environment:
Last Closed: 2023-06-27 19:31:05 UTC
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2024:0545 0 None None None 2024-01-29 14:35:37 UTC
Red Hat Product Errata RHSA-2023:3839 0 None None None 2023-06-27 14:58:01 UTC
Red Hat Product Errata RHSA-2023:6643 0 None None None 2023-11-07 08:22:22 UTC
Red Hat Product Errata RHSA-2024:0538 0 None None None 2024-01-29 08:20:06 UTC

Description Pedro Sampaio 2023-03-27 21:16:47 UTC
In libssh before versions 0.10.5 and 0.9.7 a NULL pointer dereference during rekeying with algorithm guessing may lead to remote denial of service from authenticated clients.

Comment 5 Sandipan Roy 2023-05-08 04:46:20 UTC
Created libssh tracking bugs for this issue:

Affects: epel-7 [bug 2196099]
Affects: fedora-all [bug 2196098]

Comment 6 Michal Skrivanek 2023-06-02 07:20:32 UTC
There's no tracker for rhel-8.6.0.z, is it not getting fixed there? (see also https://bugzilla.redhat.com/show_bug.cgi?id=2182202#c5)

Comment 7 Jakub Jelen 2023-06-02 10:56:07 UTC
Correct. No plans to fix this yet in 8.6.z.

This CVE affects SSH servers built with libssh. The client use in ansible is not affected, I believe.

https://www.libssh.org/2023/05/04/libssh-0-10-5-and-libssh-0-9-7-security-releases/

Comment 8 errata-xmlrpc 2023-06-27 14:57:58 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:3839 https://access.redhat.com/errata/RHSA-2023:3839

Comment 9 Product Security DevOps Team 2023-06-27 19:31:01 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-2023-1667

Comment 10 errata-xmlrpc 2023-11-07 08:22:19 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:6643 https://access.redhat.com/errata/RHSA-2023:6643

Comment 11 errata-xmlrpc 2024-01-29 08:20:02 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2024:0538 https://access.redhat.com/errata/RHSA-2024:0538


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