Lemur 0.1.4 AES CBC Entropy entropy

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Lemur 0.1.4. Affected by this issue is some unknown functionality of the component AES. The manipulation as part of CBC results in entropy (Entropy). This vulnerability is known as CVE-2015-7764. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Lemur 0.1.4. Affected is an unknown part of the component AES. The manipulation as part of a CBC leads to a entropy vulnerability (Entropy). CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Lemur 0.1.4 does not use sufficient entropy in its IV when encrypting AES in CBC mode.

The bug was discovered 10/06/2015. The weakness was published 08/09/2017 (oss-sec). The advisory is available at openwall.com. This vulnerability is traded as CVE-2015-7764 since 10/09/2015. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1600.001 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 673 days. During that time the estimated underground price was around $0-$5k.

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

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Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.6
VulDB Temp Score: 5.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/06/2015 🔍
10/09/2015 +3 days 🔍
08/09/2017 +670 days 🔍
08/09/2017 +0 days 🔍
08/10/2017 +1 days 🔍
12/15/2022 +1953 days 🔍

Sourcesinfo

Advisory: 117
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-7764 (🔍)
GCVE (CVE): GCVE-0-2015-7764
GCVE (VulDB): GCVE-100-105150

Entryinfo

Created: 08/10/2017 08:35
Updated: 12/15/2022 15:07
Changes: 08/10/2017 08:35 (59), 11/05/2019 19:30 (1), 12/15/2022 15:07 (3)
Complete: 🔍
Cache ID: 216:3EC:103

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