CVE-2017-7890

Name: CVE-2017-7890
Creator: NVD / NIST
Published: 2017-08-02T19:29:00.897+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.42%

Last modified Jun 17, 2026

CVE-2017-7890 is a vulnerability of currently unknown severity. The GIF decoding function gdImageCreateFromGifCtx in gd_gif_in.c in the GD Graphics Library (aka libgd), as used in PHP before 5.6.31 and 7.x before 7.1.7, does not zero colorMap arrays before use. A specially crafted GIF image could use the uninitialized tables to read ~700 bytes from the top of the stack, potentially disclosing sensitive information.. EPSS estimates a 3.42% chance of exploitation in the next 30 days.

Description

The GIF decoding function gdImageCreateFromGifCtx in gd_gif_in.c in the GD Graphics Library (aka libgd), as used in PHP before 5.6.31 and 7.x before 7.1.7, does not zero colorMap arrays before use. A specially crafted GIF image could use the uninitialized tables to read ~700 bytes from the top of the stack, potentially disclosing sensitive information.

Metrics

EPSS Probability

3.42%

87.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Php	Php	<= 5.6.30
Php	Php	7.0.0
Php	Php	7.0.1
Php	Php	7.0.2
Php	Php	7.0.3
Php	Php	7.0.4
Php	Php	7.0.5
Php	Php	7.0.6
Php	Php	7.0.7
Php	Php	7.0.8
Php	Php	7.0.9
Php	Php	7.0.10
Php	Php	7.0.11
Php	Php	7.0.12
Php	Php	7.0.13
Php	Php	7.0.14
Php	Php	7.0.15
Php	Php	7.0.16
Php	Php	7.0.17
Php	Php	7.0.18
Php	Php	7.0.19
Php	Php	7.0.20
Php	Php	7.1.0
Php	Php	7.1.1
Php	Php	7.1.2
Php	Php	7.1.3
Php	Php	7.1.4
Php	Php	7.1.5
Php	Php	7.1.6

References

http://php.net/ChangeLog-5.phpRelease Notes, Vendor Advisory
http://php.net/ChangeLog-7.phpRelease Notes, Vendor Advisory
http://www.debian.org/security/2017/dsa-3938
http://www.securityfocus.com/bid/99492Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:0406
https://access.redhat.com/errata/RHSA-2018:1296
https://bugs.php.net/bug.php?id=74435Patch, Vendor Advisory
https://bugs.php.net/patch-display.php?bug=74435&patch=fix-74435-php-7.0&revision=1497970038Issue Tracking, Patch, Vendor Advisory
https://security.netapp.com/advisory/ntap-20180112-0001/
https://www.tenable.com/security/tns-2017-12
http://php.net/ChangeLog-5.phpRelease Notes, Vendor Advisory
http://php.net/ChangeLog-7.phpRelease Notes, Vendor Advisory
http://www.debian.org/security/2017/dsa-3938
http://www.securityfocus.com/bid/99492Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:0406
https://access.redhat.com/errata/RHSA-2018:1296
https://bugs.php.net/bug.php?id=74435Patch, Vendor Advisory
https://bugs.php.net/patch-display.php?bug=74435&patch=fix-74435-php-7.0&revision=1497970038Issue Tracking, Patch, Vendor Advisory
https://security.netapp.com/advisory/ntap-20180112-0001/
https://www.tenable.com/security/tns-2017-12

Timeline

Published: Aug 2, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-7890?

How severe is CVE-2017-7890?

Severity scoring for CVE-2017-7890 is pending analysis. The EPSS model estimates a 3.42% probability of exploitation in the next 30 days.

How do I fix CVE-2017-7890?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-7890?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST