Amazon Linux AMI update for php54

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU32548

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-7345

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The BEGIN regular expression in the awk script detector in magic/Magdir/commands in file before 5.15 uses multiple wildcards with unlimited repetitions, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted ASCII file that triggers a large amount of backtracking, as demonstrated via a file with many newline characters.

Mitigation

Update the affected packages:

i686:
    php54-tidy-5.4.28-1.54.amzn1.i686
    php54-recode-5.4.28-1.54.amzn1.i686
    php54-snmp-5.4.28-1.54.amzn1.i686
    php54-mysqlnd-5.4.28-1.54.amzn1.i686
    php54-cli-5.4.28-1.54.amzn1.i686
    php54-gd-5.4.28-1.54.amzn1.i686
    php54-pdo-5.4.28-1.54.amzn1.i686
    php54-odbc-5.4.28-1.54.amzn1.i686
    php54-5.4.28-1.54.amzn1.i686
    php54-mcrypt-5.4.28-1.54.amzn1.i686
    php54-fpm-5.4.28-1.54.amzn1.i686
    php54-imap-5.4.28-1.54.amzn1.i686
    php54-soap-5.4.28-1.54.amzn1.i686
    php54-bcmath-5.4.28-1.54.amzn1.i686
    php54-dba-5.4.28-1.54.amzn1.i686
    php54-mbstring-5.4.28-1.54.amzn1.i686
    php54-pgsql-5.4.28-1.54.amzn1.i686
    php54-pspell-5.4.28-1.54.amzn1.i686
    php54-devel-5.4.28-1.54.amzn1.i686
    php54-mysql-5.4.28-1.54.amzn1.i686
    php54-intl-5.4.28-1.54.amzn1.i686
    php54-ldap-5.4.28-1.54.amzn1.i686
    php54-enchant-5.4.28-1.54.amzn1.i686
    php54-mssql-5.4.28-1.54.amzn1.i686
    php54-debuginfo-5.4.28-1.54.amzn1.i686
    php54-xml-5.4.28-1.54.amzn1.i686
    php54-process-5.4.28-1.54.amzn1.i686
    php54-xmlrpc-5.4.28-1.54.amzn1.i686
    php54-common-5.4.28-1.54.amzn1.i686
    php54-embedded-5.4.28-1.54.amzn1.i686

src:
    php54-5.4.28-1.54.amzn1.src

x86_64:
    php54-mbstring-5.4.28-1.54.amzn1.x86_64
    php54-odbc-5.4.28-1.54.amzn1.x86_64
    php54-mysql-5.4.28-1.54.amzn1.x86_64
    php54-xmlrpc-5.4.28-1.54.amzn1.x86_64
    php54-mcrypt-5.4.28-1.54.amzn1.x86_64
    php54-pspell-5.4.28-1.54.amzn1.x86_64
    php54-pgsql-5.4.28-1.54.amzn1.x86_64
    php54-5.4.28-1.54.amzn1.x86_64
    php54-xml-5.4.28-1.54.amzn1.x86_64
    php54-recode-5.4.28-1.54.amzn1.x86_64
    php54-imap-5.4.28-1.54.amzn1.x86_64
    php54-process-5.4.28-1.54.amzn1.x86_64
    php54-tidy-5.4.28-1.54.amzn1.x86_64
    php54-intl-5.4.28-1.54.amzn1.x86_64
    php54-snmp-5.4.28-1.54.amzn1.x86_64
    php54-gd-5.4.28-1.54.amzn1.x86_64
    php54-enchant-5.4.28-1.54.amzn1.x86_64
    php54-dba-5.4.28-1.54.amzn1.x86_64
    php54-mysqlnd-5.4.28-1.54.amzn1.x86_64
    php54-bcmath-5.4.28-1.54.amzn1.x86_64
    php54-embedded-5.4.28-1.54.amzn1.x86_64
    php54-pdo-5.4.28-1.54.amzn1.x86_64
    php54-fpm-5.4.28-1.54.amzn1.x86_64
    php54-debuginfo-5.4.28-1.54.amzn1.x86_64
    php54-mssql-5.4.28-1.54.amzn1.x86_64
    php54-ldap-5.4.28-1.54.amzn1.x86_64
    php54-soap-5.4.28-1.54.amzn1.x86_64
    php54-devel-5.4.28-1.54.amzn1.x86_64
    php54-common-5.4.28-1.54.amzn1.x86_64
    php54-cli-5.4.28-1.54.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2014-343.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.