PEAR: Execute Arbitrary Code/Commands -- Remote/Unauthenticated

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.0428
                      USN-4723-1: PEAR vulnerability
                              9 February 2021

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           PEAR
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-36193  

Reference:         ESB-2021.0257
                   ESB-2021.0239

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-4723-1

- --------------------------BEGIN INCLUDED TEXT--------------------

USN-4723-1: PEAR vulnerability
08 February 2021

PEAR could be made to overwrite files as the administrator.
Releases

  o Ubuntu 20.10
  o Ubuntu 20.04 LTS
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS

Packages

  o php-pear - PHP Extension and Application Repository

Details

It was discovered that PEAR incorrectly handled symbolic links in archives.
A remote attacker could possibly use this issue to execute arbitrary code.

Update instructions

The problem can be corrected by updating your system to the following package
versions:

Ubuntu 20.10

  o php-pear - 1:1.10.9+submodules+notgz-1ubuntu0.20.10.2

Ubuntu 20.04

  o php-pear - 1:1.10.9+submodules+notgz-1ubuntu0.20.04.2

Ubuntu 18.04

  o php-pear - 1:1.10.5+submodules+notgz-1ubuntu1.18.04.3

Ubuntu 16.04

  o php-pear - 1:1.10.1+submodules+notgz-6ubuntu0.3

In general, a standard system update will make all the necessary changes.

References

  o CVE-2020-36193

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967

iQIVAwUBYCIDV+NLKJtyKPYoAQgZ0w//dgFE9dHxWLWtNhLpypZoBK7vVf5IPKxt
TwV+evUlUZ8AFGTwgVO+NVLeDonlY4yEgyf7xac0rih27huu83wG9h45K1iOZeUm
bx+yw4YegKJMNJ7vlBLS5lPGrZHiy3tgnBtdAQK/GOjZwT5yv5jRK5axvSHk4Cm5
atiCrlDheIQDgdVrPJuq3Qt+wy4FUbrcl/nQoJqrtQNxftUH7z1ZLMqId/4NKA8G
fTKOmcIGGgpbZ4OsqEX4vde30v5bTpsoKaAcL5PDj3UL5j9QQROl2TbPTdXmtYar
wH7nddU9Ms3kWMu92+dNj56Pxu+wYv3CJ8baCkxgxTC0erhqERDmtJIxCjl5K8gT
RTV5k5sDFYDgtuOaLrgPWFDPADurq8u/83C2SKcXTBOPGZB87pQLSxiL2k7ERGCP
yzFQeS0cyoiN6FL04/i7nCyjVb+q9g6meBWrg5sKWmGGghNrJVgND8BiBV3ykXoT
KnhvCkdLJ2g1JARnjpcyaUImZvvg8eWqXuOV+G617ii23fI6uoWdDwpiLJaqK8aX
BQDMGrGGXZiR3bGTNPu6qkoOTNpDLLZ8du9bN4ujm3OQTRCs7AK9To5hS0VFlH/U
/ab5T1W5ohl8LlzJcm60RMZubEU/4a0tehTkNeWy68oyrinwXCHGPfyRBeQtnP3T
NwaQ1hVgvhQ=
=vTkx
-----END PGP SIGNATURE-----