Tor up to 0.4.6.4 v3 Onion Service Descriptor Parser out-of-bounds

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 (≈)
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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.
3.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Tor up to 0.4.6.4. Affected by this vulnerability is an unknown functionality of the component v3 Onion Service Descriptor Parser. Executing a manipulation can lead to out-of-bounds. This vulnerability is registered as CVE-2021-34550. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Tor up to 0.4.6.4 (Network Encryption Software). This vulnerability affects some unknown functionality of the component v3 Onion Service Descriptor Parser. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability.

The weakness was published 06/30/2021. The advisory is shared for download at gitlab.torproject.org. This vulnerability was named CVE-2021-34550. There are neither technical details nor an exploit publicly available.

Upgrading to version 0.4.6.5 eliminates this vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

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: Tor 0.4.6.5

Timelineinfo

06/10/2021 🔍
06/30/2021 +20 days 🔍
06/30/2021 +0 days 🔍
07/03/2021 +3 days 🔍

Sourcesinfo

Advisory: gitlab.torproject.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-34550 (🔍)
GCVE (CVE): GCVE-0-2021-34550
GCVE (VulDB): GCVE-100-177760

Entryinfo

Created: 06/30/2021 10:37
Updated: 07/03/2021 20:55
Changes: 06/30/2021 10:37 (38), 07/03/2021 20:55 (6)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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