Information disclosure in php7 (Alpine package)

Published: 2017-09-29
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2017-7890
Exploitation vector Network
Public exploit N/A
Vulnerable software
php7 (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU11789

Risk: Low


CVE-ID: CVE-2017-7890

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No


The vulnerability allows a remote attacker to obtain potentially sensitive information.

The weakness exists in the GIF decoding function gdImageCreateFromGifCtx in gd_gif_in.c due to it does not zero colorMap arrays before use. A remote attacker can trick the victim into opening a specially crafted GIF image that could use the uninitialized tables to read ~700 bytes from the top of the stack and gain access to potentially sensitive information.


Install update from vendor's website.

Vulnerable software versions

php7 (Alpine package): 7.1.9-r1

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?