| 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. |
|---|---|---|
| 6.0 | $0-$5k | 0.04 |
A vulnerability classified as critical has been found in Apple tvOS up to 14.6 (Digital Media Player). This affects an unknown functionality of the component FontParser. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-121. This is going to have an impact on confidentiality, integrity, and availability.
The weakness was presented 07/19/2021 by hjy79425575 as HT212604 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is uniquely identified as CVE-2021-30759 since 04/13/2021. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/28/2021). The advisory points out:
Processing a maliciously crafted font file may lead to arbitrary code execution
Upgrading to version 14.7 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:
A stack overflow was addressed with improved input validation.
Type
Vendor
Name
VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0
VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍
| 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: 🔍
Class: Memory corruption
CWE: CWE-121
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒
| 0-Day | unlock | unlock | unlock | unlock |
|---|---|---|---|---|
| Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍Recommended: Upgrade
Status: 🔍
Reaction Time: 🔒
0-Day Time: 🔒
Exposure Time: 🔒
Upgrade: tvOS 14.7
04/13/2021 CVE assigned
07/19/2021 Advisory disclosed
07/19/2021 Countermeasure disclosed
07/23/2021 VulDB entry created
07/28/2021 VulDB last updateVendor: https://www.apple.com/
Advisory: HT212604
Researcher: hjy79425575
Status: Confirmed
CVE: CVE-2021-30759 (🔒)
Created: 07/23/2021 08:50
Updated: 07/28/2021 07:14
Changes: (1) source_cve_assigned
Complete: 🔍
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