GD Graphics Library up to 2.2.3 gd_io_dp.c dynamicGetbuf memory corruption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in GD Graphics Library up to 2.2.3. Impacted is the function dynamicGetbuf of the file gd_io_dp.c. The manipulation results in memory corruption. This vulnerability is cataloged as CVE-2016-8670. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in GD Graphics Library up to 2.2.3 (Image Processing Software). Affected is the function dynamicGetbuf of the file gd_io_dp.c. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Integer signedness error in the dynamicGetbuf function in gd_io_dp.c in the GD Graphics Library (aka libgd) through 2.2.3, as used in PHP before 5.6.28 and 7.x before 7.0.13, allows remote attackers to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact via a crafted imagecreatefromstring call.

The bug was discovered 11/20/2016. The weakness was shared 01/04/2017 (Website). The advisory is available at securityfocus.com. This vulnerability is traded as CVE-2016-8670 since 10/15/2016. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/27/2022).

The vulnerability was handled as a non-public zero-day exploit for at least 45 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 900040 , which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169291 (OpenSuSE Security Update for php5 (openSUSE-SU-2016:2606-1)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (900040) and SecurityFocus (BID 93594†). The entries VDB-3695, VDB-5786, VDB-5794 and VDB-9021 are related to this item. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • PHP up to 5.6.27/7.0.12

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.5

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 900040
Nessus File: 🔍

OpenVAS ID: 703693
OpenVAS Name: Debian Security Advisory DSA 3693-1 (libgd2 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

10/14/2016 🔍
10/15/2016 +1 days 🔍
11/20/2016 +36 days 🔍
01/04/2017 +45 days 🔍
01/04/2017 +0 days 🔍
01/05/2017 +1 days 🔍
10/27/2022 +2121 days 🔍

Sourcesinfo

Advisory: 73280⛔
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-8670 (🔍)
GCVE (CVE): GCVE-0-2016-8670
GCVE (VulDB): GCVE-100-95034
SecurityFocus: 93594 - PHP LibGD CVE-2016-8670 Stack Buffer Overflow Vulnerability
OSVDB: - CVE-2016-8670 - PHP and GD Graphics Library - Buffer Overflow Issue

See also: 🔍

Entryinfo

Created: 01/05/2017 12:57
Updated: 10/27/2022 15:25
Changes: 01/05/2017 12:57 (74), 10/27/2022 15:25 (3)
Complete: 🔍
Cache ID: 216:810:103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!