X.org libICE up to 1.0.9 Session Key IceGenerateMagicCookie entropy

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability has been found in X.org libICE up to 1.0.9 and classified as critical. The affected element is the function IceGenerateMagicCookie of the component Session Key Handler. This manipulation causes entropy. This vulnerability is registered as CVE-2017-2626. The attack needs to be launched locally. Furthermore, an exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in X.org libICE up to 1.0.9. Affected by this vulnerability is the function IceGenerateMagicCookie of the component Session Key Handler. The manipulation with an unknown input leads to a entropy vulnerability. The CWE definition for the vulnerability is CWE-331. The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

It was discovered that libICE before 1.0.9-8 used a weak entropy to generate keys. A local attacker could potentially use this flaw for session hijacking using the information available from the process list.

The bug was discovered 02/28/2017. The weakness was published 02/28/2017 by Eric Sesterhenn with X41 D-Sec GmbH as Advisory X41-2017-001: Multiple Vulnerabilities in X.org as confirmed mailinglist post (Full-Disclosure). The advisory is shared at seclists.org. This vulnerability is known as CVE-2017-2626 since 12/01/2016. The exploitation appears to be difficult. An attack has to be approached locally. A single authentication is necessary for exploitation. Technical details and also a public exploit are known. MITRE ATT&CK project uses the attack technique T1600.001 for this issue.

A public exploit has been developed by Eric Sesterhenn in ANSI C and been published immediately after the advisory. It is possible to download the exploit at x41-dsec.de. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 103069 (EulerOS 2.0 SP1 : libXpm libXdmcp libICE (EulerOS-SA-2017-1211)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Huawei Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 236421 (Red Hat Update for X.org X11 libraries (RHSA-2017:1865)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 7 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (103069), SecurityFocus (BID 96480†) and SecurityTracker (ID 1037919†). Similar entries are available at VDB-97342, VDB-97343, VDB-97344 and VDB-97346. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.6

VulDB Base Score: 4.5
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

Researcher Base Score: 7.1
Researcher Vector: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Entropy
CWE: CWE-331 / CWE-330 / CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Eric Sesterhenn
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 103069
Nessus Name: EulerOS 2.0 SP1 : libXpm libXdmcp libICE (EulerOS-SA-2017-1211)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for libICE FEDORA-2017-d068b54614
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

12/01/2016 🔍
02/28/2017 +89 days 🔍
02/28/2017 +0 days 🔍
02/28/2017 +0 days 🔍
02/28/2017 +0 days 🔍
02/28/2017 +0 days 🔍
02/28/2017 +0 days 🔍
08/26/2017 +179 days 🔍
09/11/2017 +16 days 🔍
07/27/2018 +318 days 🔍
08/18/2020 +753 days 🔍

Sourcesinfo

Vendor: x.org

Advisory: Advisory X41-2017-001: Multiple Vulnerabilities in X.org
Researcher: Eric Sesterhenn
Organization: X41 D-Sec GmbH
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-2626 (🔍)
GCVE (CVE): GCVE-0-2017-2626
GCVE (VulDB): GCVE-100-97345
SecurityFocus: 96480 - X.org X Server Local Multiple Security Vulnerabilities
OSVDB: - CVE-2017-2626 - libICE - Session Hijacking Issue
SecurityTracker: 1037919

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

Entryinfo

Created: 02/28/2017 20:24
Updated: 08/18/2020 07:49
Changes: 02/28/2017 20:24 (97), 08/18/2020 07:49 (8)
Complete: 🔍
Cache ID: 216:9E6:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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