python-kerberos checkPassword improper authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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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.
7.5$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in python-kerberos. This impacts the function checkPassword. Performing a manipulation results in improper authentication. This vulnerability is identified as CVE-2015-3206. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in python-kerberos (Programming Language Software) (version now known). This affects the function checkPassword. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The checkPassword function in python-kerberos does not authenticate the KDC it attempts to communicate with, which allows remote attackers to cause a denial of service (bad response), or have other unspecified impact by performing a man-in-the-middle attack.

The bug was discovered 01/25/2014. The weakness was released 08/25/2017 by Martin (oss-sec). The advisory is shared at openwall.com. This vulnerability is uniquely identified as CVE-2015-3206 since 04/10/2015. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 527 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 84507 (Debian DLA-265-2 : pykerberos regression update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l.

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (84507) and SecurityFocus (BID 74760†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
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Nessus ID: 84507
Nessus Name: Debian DLA-265-2 : pykerberos regression update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/25/2014 🔍
04/10/2015 +440 days 🔍
05/21/2015 +41 days 🔍
07/06/2015 +46 days 🔍
08/26/2015 +51 days 🔍
08/25/2017 +730 days 🔍
08/25/2017 +0 days 🔍
08/27/2017 +2 days 🔍
12/16/2022 +1937 days 🔍

Sourcesinfo

Advisory: 31
Researcher: Martin Prpic (Martin)
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-3206 (🔍)
GCVE (CVE): GCVE-0-2015-3206
GCVE (VulDB): GCVE-100-105741
SecurityFocus: 74760 - python-kerberos 'checkPassword()' Function Man in the Middle Information Disclosure Vulnerability

Entryinfo

Created: 08/27/2017 06:51
Updated: 12/16/2022 16:09
Changes: 08/27/2017 06:51 (63), 11/10/2019 11:26 (9), 01/09/2021 20:44 (3), 12/16/2022 16:09 (3)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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