synapse Synapse up to 1.23.0 Event /send_join denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in synapse Synapse up to 1.23.0. This affects an unknown function of the file /send_join of the component Event Handler. The manipulation leads to denial of service. This vulnerability is referenced as CVE-2020-26257. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in synapse Synapse up to 1.23.0 and classified as problematic. This issue affects some unknown functionality of the file /send_join of the component Event Handler. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability.

The weakness was published 12/10/2020. The advisory is shared at github.com. The identification of this vulnerability is CVE-2020-26257. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 1.23.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Synapse 1.23.1
Patch: github.com

Timelineinfo

10/01/2020 🔍
12/10/2020 +70 days 🔍
12/10/2020 +0 days 🔍
12/15/2020 +5 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2020-26257 (🔍)
GCVE (CVE): GCVE-0-2020-26257
GCVE (VulDB): GCVE-100-165965

Entryinfo

Created: 12/10/2020 07:53
Updated: 12/15/2020 14:17
Changes: 12/10/2020 07:53 (41), 12/15/2020 14:12 (6), 12/15/2020 14:17 (8)
Complete: 🔍
Cache ID: 216::103

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