Bug 2056491 (CVE-2022-23645) - CVE-2022-23645 swtpm: Unchecked header size indicator against expected size
Summary: CVE-2022-23645 swtpm: Unchecked header size indicator against expected size
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2022-23645
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2056493 Red Hat2056517 Red Hat2056518 Red Hat2061245
Blocks: Embargoed2056494
TreeView+ depends on / blocked
 
Reported: 2022-02-21 11:07 UTC by Avinash Hanwate
Modified: 2022-12-05 02:37 UTC (History)
5 users (show)

Fixed In Version: swtpm 0.5.3, 0.6.2 or 0.7.1
Doc Type: If docs needed, set a value
Doc Text:
An out-of-bounds read vulnerability was found in swtpm. The vulnerability exists due to a boundary condition when the byte array representing the state of the TPM is accessed. This flaw allows an attacker to send a specially crafted header, triggering an out-of-bounds read access on the byte array containing the TPM's state. This issue can crash swtpm or prevent it from starting.
Clone Of:
Environment:
Last Closed: 2022-12-05 02:37:14 UTC

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2022:7472 0 None None None 2022-11-08 09:13:51 UTC
Red Hat Product Errata RHSA-2022:8100 0 None None None 2022-11-15 10:15:51 UTC

Description Avinash Hanwate 2022-02-21 11:07:09 UTC 
swtpm is a libtpms-based TPM emulator with socket, character device, and Linux CUSE interface. Versions prior to 0.5.3, 0.6.2, and 0.7.1 are vulnerable to out-of-bounds read. A specially crafted header of swtpm's state, where the blobheader's hdrsize indicator has an invalid value, may cause an out-of-bounds access when the byte array representing the state of the TPM is accessed. This will likely crash swtpm or prevent it from starting since the state cannot be understood. Users should upgrade to swtpm v0.5.3, v0.6.2, or v0.7.1 to receive a patch. There are currently no known workarounds.

https://github.com/stefanberger/swtpm/security/advisories/GHSA-2qgm-8xf4-3hqw
https://github.com/stefanberger/swtpm/commit/9f740868fc36761de27df3935513bdebf8852d19
https://github.com/stefanberger/swtpm/releases/tag/v0.5.3
https://github.com/stefanberger/swtpm/releases/tag/v0.6.2
https://github.com/stefanberger/swtpm/releases/tag/v0.7.1
Comment 1 Avinash Hanwate 2022-02-21 11:07:50 UTC 
Created swtpm tracking bugs for this issue:

Affects: fedora-all [bug 2056493]
Comment 7 errata-xmlrpc 2022-11-08 09:13:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:7472 https://access.redhat.com/errata/RHSA-2022:7472
Comment 8 errata-xmlrpc 2022-11-15 10:15:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2022:8100 https://access.redhat.com/errata/RHSA-2022:8100
Comment 9 Product Security DevOps Team 2022-12-05 02:37:12 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-2022-23645
Note You need to log in before you can comment on or make changes to this bug.