VDB-183793 · CVE-2021-39899 · Issue 33915

GitHub Community Edition/Enterprise Edition Change Password excessive authentication

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.
4.3	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in GitHub Community Edition and Enterprise Edition. Impacted is an unknown function of the component Change Password Handler. This manipulation causes excessive authentication. This vulnerability appears as CVE-2021-39899. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability has been found in GitHub Community Edition and Enterprise Edition (Bug Tracking Software) (affected version unknown) and classified as problematic. Affected by this vulnerability is an unknown functionality of the component Change Password Handler. The manipulation with an unknown input leads to a excessive authentication vulnerability. The CWE definition for the vulnerability is CWE-307. The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame, making it more susceptible to brute force attacks. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was presented 10/05/2021 as 33915. The advisory is shared at gitlab.com. This vulnerability is known as CVE-2021-39899 since 08/23/2021. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1110.001 for this issue.

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

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

Productinfo

Type

Bug Tracking Software

Vendor

GitHub

Name

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.3

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

CNA Base Score: 2.9
CNA Vector (GitLab Inc.): 🔍

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: 🔍

Exploitinginfo

Class: Excessive authentication
CWE: CWE-307 / CWE-799 / CWE-400
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Partially
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/23/2021 🔍
10/05/2021 +43 days 🔍
10/05/2021 +0 days 🔍
10/08/2021 +3 days 🔍

Sourcesinfo

Advisory: 33915
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-39899 (🔍)
GCVE (CVE): GCVE-0-2021-39899
GCVE (VulDB): GCVE-100-183793

Entryinfo

Created: 10/05/2021 08:00
Updated: 10/08/2021 20:26
Changes: 10/05/2021 08:00 (49), 10/08/2021 20:17 (1), 10/08/2021 20:26 (1)
Complete: 🔍
Cache ID: 216::103