Apple iOS/iPadOS up to 14.1 FontParser out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$5k-$25k0.00

A vulnerability classified as critical has been found in Apple iOS and iPadOS up to 14.1 (Smartphone Operating System). Affected is some unknown functionality of the component FontParser. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was released 11/05/2020 by Xingwei Lin as HT211929 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability is traded as CVE-2020-27927. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 11/06/2020). It is expected to see the exploit prices for this product increasing in the near future. The advisory points out:

Processing a maliciously crafted font file may lead to arbitrary code execution

Upgrading to version 14.2 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

An out-of-bounds write issue was addressed with improved bounds checking.

Productinfo

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Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

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: 🔍

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
ATT&CK: Unknown

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: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: iOS/iPadOS 14.2

Timelineinfo

10/27/2020 🔍
11/05/2020 +9 days 🔍
11/05/2020 +0 days 🔍
11/06/2020 +1 days 🔍
12/02/2020 +26 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT211929
Researcher: Xingwei Lin
Status: Confirmed

CVE: CVE-2020-27927 (🔍)
scip Labs: https://www.scip.ch/en/?labs.20150917

Entryinfo

Created: 11/06/2020 07:56
Updated: 12/02/2020 19:49
Changes: 11/06/2020 07:56 (18), 11/06/2020 07:59 (29), 12/02/2020 19:49 (1)
Complete: 🔍

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