Amazon Linux AMI update for php55

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:
    php55-cli-5.5.11-1.71.amzn1.i686
    php55-soap-5.5.11-1.71.amzn1.i686
    php55-5.5.11-1.71.amzn1.i686
    php55-pspell-5.5.11-1.71.amzn1.i686
    php55-recode-5.5.11-1.71.amzn1.i686
    php55-fpm-5.5.11-1.71.amzn1.i686
    php55-mysqlnd-5.5.11-1.71.amzn1.i686
    php55-common-5.5.11-1.71.amzn1.i686
    php55-gmp-5.5.11-1.71.amzn1.i686
    php55-embedded-5.5.11-1.71.amzn1.i686
    php55-mcrypt-5.5.11-1.71.amzn1.i686
    php55-ldap-5.5.11-1.71.amzn1.i686
    php55-mssql-5.5.11-1.71.amzn1.i686
    php55-imap-5.5.11-1.71.amzn1.i686
    php55-intl-5.5.11-1.71.amzn1.i686
    php55-dba-5.5.11-1.71.amzn1.i686
    php55-xml-5.5.11-1.71.amzn1.i686
    php55-bcmath-5.5.11-1.71.amzn1.i686
    php55-devel-5.5.11-1.71.amzn1.i686
    php55-enchant-5.5.11-1.71.amzn1.i686
    php55-odbc-5.5.11-1.71.amzn1.i686
    php55-process-5.5.11-1.71.amzn1.i686
    php55-mbstring-5.5.11-1.71.amzn1.i686
    php55-debuginfo-5.5.11-1.71.amzn1.i686
    php55-xmlrpc-5.5.11-1.71.amzn1.i686
    php55-pgsql-5.5.11-1.71.amzn1.i686
    php55-pdo-5.5.11-1.71.amzn1.i686
    php55-tidy-5.5.11-1.71.amzn1.i686
    php55-opcache-5.5.11-1.71.amzn1.i686
    php55-snmp-5.5.11-1.71.amzn1.i686
    php55-gd-5.5.11-1.71.amzn1.i686

src:
    php55-5.5.11-1.71.amzn1.src

x86_64:
    php55-mbstring-5.5.11-1.71.amzn1.x86_64
    php55-dba-5.5.11-1.71.amzn1.x86_64
    php55-opcache-5.5.11-1.71.amzn1.x86_64
    php55-intl-5.5.11-1.71.amzn1.x86_64
    php55-process-5.5.11-1.71.amzn1.x86_64
    php55-cli-5.5.11-1.71.amzn1.x86_64
    php55-odbc-5.5.11-1.71.amzn1.x86_64
    php55-mysqlnd-5.5.11-1.71.amzn1.x86_64
    php55-imap-5.5.11-1.71.amzn1.x86_64
    php55-gd-5.5.11-1.71.amzn1.x86_64
    php55-fpm-5.5.11-1.71.amzn1.x86_64
    php55-xml-5.5.11-1.71.amzn1.x86_64
    php55-embedded-5.5.11-1.71.amzn1.x86_64
    php55-mcrypt-5.5.11-1.71.amzn1.x86_64
    php55-mssql-5.5.11-1.71.amzn1.x86_64
    php55-bcmath-5.5.11-1.71.amzn1.x86_64
    php55-common-5.5.11-1.71.amzn1.x86_64
    php55-devel-5.5.11-1.71.amzn1.x86_64
    php55-ldap-5.5.11-1.71.amzn1.x86_64
    php55-snmp-5.5.11-1.71.amzn1.x86_64
    php55-pdo-5.5.11-1.71.amzn1.x86_64
    php55-xmlrpc-5.5.11-1.71.amzn1.x86_64
    php55-tidy-5.5.11-1.71.amzn1.x86_64
    php55-gmp-5.5.11-1.71.amzn1.x86_64
    php55-debuginfo-5.5.11-1.71.amzn1.x86_64
    php55-recode-5.5.11-1.71.amzn1.x86_64
    php55-pgsql-5.5.11-1.71.amzn1.x86_64
    php55-enchant-5.5.11-1.71.amzn1.x86_64
    php55-soap-5.5.11-1.71.amzn1.x86_64
    php55-5.5.11-1.71.amzn1.x86_64
    php55-pspell-5.5.11-1.71.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2014-332.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.