HOMEVULNERABILITIESCVE-2016-7568
CRITICAL

CVE-2016-7568

CWE-190Published: September 28, 2016· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

Integer overflow in the gdImageWebpCtx function in gd_webp.c in the GD Graphics Library (aka libgd) through 2.2.3, as used in PHP through 7.0.11, allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via crafted imagewebp and imagedestroy calls.

NVD Source

Technical Analysis

CVE-2016-7568 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Debian1 product(s)
debian linux
libgd1 product(s)
libgd
PHP1 product(s)
php
Source: NVD CPE · 3 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/libgd/libgd/commit/40bec0f38f50e8510f5bb71a82f516d46facde03
PATCHhttps://github.com/libgd/libgd/issues/308
PATCHhttps://github.com/php/php-src/commit/c18263e0e0769faee96a5d0ee04b750c442783c6
PATCHhttps://github.com/libgd/libgd/commit/40bec0f38f50e8510f5bb71a82f516d46facde03
PATCHhttps://github.com/libgd/libgd/issues/308
PATCHhttps://github.com/php/php-src/commit/c18263e0e0769faee96a5d0ee04b750c442783c6
ADVISORYhttp://www.debian.org/security/2016/dsa-3693
ADVISORYhttp://www.securityfocus.com/bid/93184
ADVISORYhttps://bugs.php.net/bug.php?id=73003
ADVISORYhttps://security.gentoo.org/glsa/201612-09
ADVISORYhttp://www.debian.org/security/2016/dsa-3693
ADVISORYhttp://www.securityfocus.com/bid/93184
ADVISORYhttps://bugs.php.net/bug.php?id=73003
ADVISORYhttps://security.gentoo.org/glsa/201612-09

All References (14)

→
http://www.debian.org/security/2016/dsa-3693Third Party Advisory
→
http://www.securityfocus.com/bid/93184Third Party Advisory · VDB Entry
→
https://bugs.php.net/bug.php?id=73003Issue Tracking · Vendor Advisory
→
https://github.com/libgd/libgd/commit/40bec0f38f50e8510f5bb71a82f516d46facde03Issue Tracking · Patch · Third Party Advisory
→
https://github.com/libgd/libgd/issues/308Issue Tracking · Patch · Third Party Advisory
→
https://github.com/php/php-src/commit/c18263e0e0769faee96a5d0ee04b750c442783c6Issue Tracking · Patch · Third Party Advisory
→
https://security.gentoo.org/glsa/201612-09Third Party Advisory
→
http://www.debian.org/security/2016/dsa-3693Third Party Advisory
→
http://www.securityfocus.com/bid/93184Third Party Advisory · VDB Entry
→
https://bugs.php.net/bug.php?id=73003Issue Tracking · Vendor Advisory
→
https://github.com/libgd/libgd/commit/40bec0f38f50e8510f5bb71a82f516d46facde03Issue Tracking · Patch · Third Party Advisory
→
https://github.com/libgd/libgd/issues/308Issue Tracking · Patch · Third Party Advisory
→
https://github.com/php/php-src/commit/c18263e0e0769faee96a5d0ee04b750c442783c6Issue Tracking · Patch · Third Party Advisory
→
https://security.gentoo.org/glsa/201612-09Third Party Advisory

Quick Facts

CVE IDCVE-2016-7568
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-190
CISA KEVNo
Affected3 vendor(s)
PublishedSep 28, 2016

Related CVEs (CWE-190)

CVE-2015-5108
10.0
CVE-2015-5097
10.0
CVE-2010-3254
10.0
CVE-2013-2555
10.0
CVE-2008-2663
10.0
CVE-2012-5143
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2016-7568 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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