Out-of-bounds read in PHP

1) Out-of-bounds read

EUVDB-ID: #VU33364

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-11047

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to #BASIC_IMPACT#.

When PHP EXIF extension is parsing EXIF information from an image, e.g. via exif_read_data() function, in PHP versions 7.2.x below 7.2.26, 7.3.x below 7.3.13 and 7.4.0 it is possible to supply it with data what will cause it to read past the allocated buffer. This may lead to information disclosure or crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

PHP: 7.4.0

Debian Linux: 7.4.0 - 8.0

Fedora: 7.4.0 - 31

External links

http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00036.html
http://bugs.php.net/bug.php?id=78910
http://lists.debian.org/debian-lts-announce/2019/12/msg00034.html
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N7GCOAE6KVHYJ3UQ4KLPLTGSLX6IRVRN/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XWRQPYXVG43Q7DXMXH6UVWMKWGUW552F/
http://seclists.org/bugtraq/2020/Feb/27
http://seclists.org/bugtraq/2020/Feb/31
http://security.netapp.com/advisory/ntap-20200103-0002/
http://usn.ubuntu.com/4239-1/
http://www.debian.org/security/2020/dsa-4626
http://www.debian.org/security/2020/dsa-4628

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.