-----BEGIN PGP SIGNED MESSAGE-----
AUSCERT External Security Bulletin Redistribution
[DLA 1608-1] php5 security update
17 December 2018
AusCERT Security Bulletin Summary
Operating System: Debian GNU/Linux 8
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Remote with User Interaction
CVE Names: CVE-2018-19935 CVE-2018-19518
- --------------------------BEGIN INCLUDED TEXT--------------------
Package : php5
Version : 5.6.39+dfsg-0+deb8u1
CVE ID : CVE-2018-19518 CVE-2018-19935
Vulnerabilities have been discovered in php5, a server-side,
HTML-embedded scripting language. Note that this update includes a
change to the default behavior for IMAP connections. See below for
An argument injection vulnerability in imap_open() may allow a
remote attacker to execute arbitrary OS commands on the IMAP server.
The fix for the CVE-2018-19518 vulnerability included this
additional note from the upstream developers:
Starting with 5.6.38, rsh/ssh logins are disabled by default. Use
imap.enable_insecure_rsh if you want to enable them. Note that the
IMAP library does not filter mailbox names before passing them to
rsh/ssh command, thus passing untrusted data to this function with
rsh/ssh enabled is insecure.
A NULL pointer dereference leads to an application crash and a
denial of service via an empty string in the message argument to the
imap_mail function of ext/imap/php_imap.c.
For Debian 8 "Jessie", these problems have been fixed in version
We recommend that you upgrade your php5 packages.
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
- --------------------------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 firstname.lastname@example.org
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:
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: email@example.com
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-----
-----END PGP SIGNATURE-----