BookStack up to 0.25.4 Image Upload neutralization of directives

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

A vulnerability was found in BookStack up to 0.25.4. It has been classified as critical. This affects an unknown function of the component Image Upload. The manipulation with an unknown input leads to a neutralization of directives vulnerability. CWE is classifying the issue as CWE-95. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes code syntax before using the input in a dynamic evaluation call (e.g. "eval"). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

BookStack before version 0.25.5 has a vulnerability where a user could upload PHP files through image upload functions, which would allow them to execute code on the host system remotely. They would then have the permissions of the PHP process. This most impacts scenarios where non-trusted users are given permission to upload images in any area of the application. The issue was addressed in a series of patches in versions 0.25.3, 0.25.4 and 0.25.5. Users should upgrade to at least v0.25.5 to avoid this vulnerability.

The weakness was presented 03/09/2020 (GitHub Repository). The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2020-5256 since 01/02/2020. The exploitability is told to be difficult. It is possible to initiate the attack remotely. The successful exploitation requires a authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

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

See VDB-103505, VDB-124539, VDB-125360 and VDB-135718 for similar entries.

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 7.0

VulDB Base Score: 5.5
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.9
NVD Vector: 🔍

CNA Base Score: 7.9
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Neutralization of directives
CWE: CWE-95 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

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: 🔍

Upgrade: github.com

Timelineinfo

01/02/2020 🔍
03/09/2020 +67 days 🔍
03/10/2020 +1 days 🔍
04/10/2024 +1492 days 🔍

Sourcesinfo

Advisory: GHSA-g9rq-x4fj-f5hx
Status: Not defined

CVE: CVE-2020-5256 (🔍)
See also: 🔍

Entryinfo

Created: 03/10/2020 08:13
Updated: 04/10/2024 10:42
Changes: 03/10/2020 08:13 (36), 03/10/2020 08:18 (11), 04/10/2024 10:36 (18), 04/10/2024 10:42 (19)
Complete: 🔍
Cache ID: 3:70E:103

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