Ubuntu update for PHP

1) Resource exhaustion

EUVDB-ID: #VU28318

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-11048

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the way PHP handles long filenames or field names during file upload. A remote attacker can supply an overly long filename to the application that will lead PHP engine to try to allocate oversized memory storage, hit the memory limit and stop processing the request, without cleaning up temporary files created by upload request. This will lead to accumulation of uncleaned temporary files exhausting the disk space on the target server.

Mitigation

Update the affected packages.

Ubuntu 20.04 LTS

libapache2-mod-php7.4 - 7.4.3-4ubuntu2.2

php7.4-cgi - 7.4.3-4ubuntu2.2

php7.4-cli - 7.4.3-4ubuntu2.2

php7.4-fpm - 7.4.3-4ubuntu2.2

php7.4-mbstring - 7.4.3-4ubuntu2.2

Ubuntu 19.10

libapache2-mod-php7.3 - 7.3.11-0ubuntu0.19.10.6

php7.3-cgi - 7.3.11-0ubuntu0.19.10.6

php7.3-cli - 7.3.11-0ubuntu0.19.10.6

php7.3-fpm - 7.3.11-0ubuntu0.19.10.6

php7.3-mbstring - 7.3.11-0ubuntu0.19.10.6

Ubuntu 18.04 LTS

libapache2-mod-php7.2 - 7.2.24-0ubuntu0.18.04.6

php7.2-cgi - 7.2.24-0ubuntu0.18.04.6

php7.2-cli - 7.2.24-0ubuntu0.18.04.6

php7.2-fpm - 7.2.24-0ubuntu0.18.04.6

php7.2-mbstring - 7.2.24-0ubuntu0.18.04.6

Ubuntu 16.04 LTS

libapache2-mod-php7.0 - 7.0.33-0ubuntu0.16.04.15

php7.0-cgi - 7.0.33-0ubuntu0.16.04.15

php7.0-cli - 7.0.33-0ubuntu0.16.04.15

php7.0-fpm - 7.0.33-0ubuntu0.16.04.15

php7.0-mbstring - 7.0.33-0ubuntu0.16.04.15

Ubuntu 14.04 ESM

libapache2-mod-php5 - 5.5.9+dfsg-1ubuntu4.29+esm12

php5-cgi - 5.5.9+dfsg-1ubuntu4.29+esm12

php5-cli - 5.5.9+dfsg-1ubuntu4.29+esm12

php5-fpm - 5.5.9+dfsg-1ubuntu4.29+esm12

Ubuntu 12.04 ESM

libapache2-mod-php5 - 5.3.10-1ubuntu3.47

php5-cgi - 5.3.10-1ubuntu3.47

php5-cli - 5.3.10-1ubuntu3.47

php5-fpm - 5.3.10-1ubuntu3.47

Vulnerable software versions

php7.4 (Ubuntu package): 7.4.3-4ubuntu2.1

php7.3 (Ubuntu package): 7.3.11-0ubuntu0.19.10.1 - 7.3.11-0ubuntu0.19.10.5

php7.2 (Ubuntu package): 7.2.24-0ubuntu0.18.04.1 - 7.2.24-0ubuntu0.18.04.5

php7.0 (Ubuntu package): 7.0.33-0ubuntu0.16.04.1 - 7.0.33-0ubuntu0.16.04.14

External links

http://usn.ubuntu.com/4375-1/

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.