[Bug 2009608] Re: Check size of TPM2B_NAME buffer before reading

[Rodrigo Figueiredo Zaiden]

libtpms (0.9.3-0ubuntu1.22.10.1) kinetic-security; urgency=medium

  * SECURITY UPDATE: out-of-bounds read/write
    - debian/patches/CVE-2023-1017_1018.patch: add a buffer size check and
      properly reduce bufferSize variable by the number of bytes that make
      up the cipherSize in CryptParameterDecryption() in
      src/tpm2/CryptUtil.c
    - CVE-2023-1017
    - CVE-2023-1018
  * SECURITY UPDATE: out-of-bounds read
    - debian/patches/tpm2-Check-size-of-TPM2B_NAME.patch: add a buffer
      size check in TPM2_PolicyAuthorize() in src/tpm2/EACommands.c.
    - No CVE number

 -- Rodrigo Figueiredo Zaiden <rodrigo.zaiden at canonical.com>  Wed, 01
Mar 2023 19:45:47 -0300

** Changed in: libtpms (Ubuntu Jammy)
       Status: In Progress => Fix Released

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Title:
  Check size of TPM2B_NAME buffer before reading

Status in libtpms package in Ubuntu:
  Fix Released
Status in libtpms source package in Jammy:
  Fix Released
Status in libtpms source package in Kinetic:
  Fix Released
Status in libtpms source package in Lunar:
  Fix Released

Bug description:
  There is a security issue with no CVE assigned in libtpms:

  tpm2: Check size of TPM2B_NAME buffer before reading 2 bytes from it
   Fix the missing buffer size check that the TPM 2 errata v1.4 mentions in
   2.6.2 by adding a buffer size check before reading 2 bytes from a
   TPM2B_NAME buffer. There's no known CVE for this.

  upstream commit is:
  https://github.com/stefanberger/libtpms/commit/92f470c1b0a50bd6d85676a7c7ae368d8da869fe

  It should be included in Ubuntu libtpms package

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