VDB-87695 · CVE-2016-5118 · Nessus 91555

ImageMagick File Open popen access control

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.
9.3	$0-$5k	0.14

Summaryinfo

A vulnerability classified as critical has been found in ImageMagick. This vulnerability affects the function popen of the component File Open Handler. The manipulation with the input |<command> leads to access control. This vulnerability is referenced as CVE-2016-5118. Remote exploitation of the attack is possible. Furthermore, an exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in ImageMagick (Image Processing Software) (version now known). It has been rated as critical. This issue affects the function popen of the component File Open Handler. The manipulation with the input value |<command> leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The OpenBlob function in blob.c in GraphicsMagick before 1.3.24 and ImageMagick allows remote attackers to execute arbitrary code via a | (pipe) character at the start of a filename.

The weakness was published 05/30/2016 by Cristy as Add support for SanitizeString() method as confirmed git commit (GIT Repository). It is possible to read the advisory at git.imagemagick.org. The identification of this vulnerability is CVE-2016-5118 since 05/29/2016. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The exploit is available at vuldb.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 91555 (openSUSE Security Update : ImageMagick (openSUSE-2016-700)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196489 (Ubuntu Security Notification for Imagemagick Vulnerabilities (USN-2990-1)). The code used by the exploit is:

rm -f hello.txt
convert '|echo Hello > hello.txt;' null:
ls hello.txt

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.imagemagick.org. A possible mitigation has been published immediately after the disclosure of the vulnerability. The vulnerability will be addressed with the following lines of code:

MagickExport char *SanitizeString(const char *source)
{
  char
    *sanitize_source;

  const char
    *q;
  
  register char
    *p;
  
  static char
    whitelist[] =
      "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 "
      "$-_.+!*'(),{}|\\^~[]`\"><#%;/?:@&=";
  
  sanitize_source=AcquireString(source);
  p=sanitize_source;
  q=sanitize_source+strlen(sanitize_source);
  for (p+=strspn(p,whitelist); p != q; p+=strspn(p,whitelist))
    *p='_';
  return(sanitize_source);
}

The vulnerability is also documented in the databases at Tenable (91555), SecurityFocus (BID 90938†) and SecurityTracker (ID 1035984†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Image Processing Software

Name

ImageMagick

License

open-source

Website

Product: https://www.imagemagick.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.3

VulDB Base Score: 9.8
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 91555
Nessus Name: openSUSE Security Update : ImageMagick (openSUSE-2016-700)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 860034
OpenVAS Name: SuSE Update for ImageMagick openSUSE-SU-2016:1653-1 (ImageMagick)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: git.imagemagick.org
Suricata ID: 2022846
Suricata Class: 🔍
Suricata Message: 🔍

Timelineinfo

05/29/2016 🔍
05/29/2016 +0 days 🔍
05/30/2016 +1 days 🔍
05/30/2016 +0 days 🔍
05/30/2016 +0 days 🔍
05/31/2016 +1 days 🔍
06/10/2016 +10 days 🔍
06/10/2016 +0 days 🔍
11/19/2024 +3084 days 🔍

Sourcesinfo

Product: imagemagick.org

Advisory: Add support for SanitizeString() method
Researcher: Cristy
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-5118 (🔍)
GCVE (CVE): GCVE-0-2016-5118
GCVE (VulDB): GCVE-100-87695

OVAL: 🔍

SecurityFocus: 90938 - ImageMagick CVE-2016-5118 Remote Command Execution Vulnerability
SecurityTracker: 1035984

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/31/2016 11:23
Updated: 11/19/2024 22:44
Changes: 05/31/2016 11:23 (82), 12/22/2018 10:45 (12), 11/19/2024 22:44 (17)
Complete: 🔍
Cache ID: 216:763:103

Be aware that VulDB is the high quality source for vulnerability data.

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