VDB-148564 · CVE-2020-6835 · GCVE-0-2020-6835

bftpd up to 5.3 File Transfer off-by-one

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.
8.4	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in bftpd up to 5.3. This impacts an unknown function of the component File Transfer Handler. Executing a manipulation can lead to off-by-one. The identification of this vulnerability is CVE-2020-6835. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in bftpd up to 5.3 (File Transfer Software). This vulnerability affects an unknown part of the component File Transfer Handler. The manipulation with an unknown input leads to a off-by-one vulnerability. The CWE definition for the vulnerability is CWE-193. A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in Bftpd before 5.4. There is a heap-based off-by-one error during file-transfer error checking.

The weakness was shared 01/10/2020. This vulnerability was named CVE-2020-6835 since 01/10/2020. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 5.4 eliminates this vulnerability.

The entry VDB-148562 is related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

File Transfer Software

Name

bftpd

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Off-by-one
CWE: CWE-193 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: bftpd 5.4

Timelineinfo

01/10/2020 🔍
01/10/2020 +0 days 🔍
01/11/2020 +1 days 🔍
03/20/2024 +1530 days 🔍

Sourcesinfo

Advisory: bftpd.sourceforge.net
Status: Not defined

CVE: CVE-2020-6835 (🔍)
GCVE (CVE): GCVE-0-2020-6835
GCVE (VulDB): GCVE-100-148564
See also: 🔍

Entryinfo

Created: 01/11/2020 09:26
Updated: 03/20/2024 17:09
Changes: 01/11/2020 09:26 (37), 01/11/2020 09:31 (18), 03/20/2024 17:09 (18)
Complete: 🔍
Cache ID: 216::103