VDB-101212 · CVE-2017-8244 · BID 98547

Google Android Linux Kernel core_info_read/inst_info_read dbg_buf Kernel Memory memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Google Android. It has been declared as critical. Affected by this issue is the function core_info_read/inst_info_read of the component Linux Kernel. Executing a manipulation of the argument dbg_buf can lead to memory corruption (Kernel Memory). This vulnerability is tracked as CVE-2017-8244. The attack is restricted to local execution. No exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Google Android (Smartphone Operating System) (version now known). It has been declared as critical. This vulnerability affects the function core_info_read/inst_info_read of the component Linux Kernel. The manipulation of the argument dbg_buf with an unknown input leads to a memory corruption vulnerability (Kernel Memory). The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In core_info_read and inst_info_read in all Android releases from CAF using the Linux kernel, variable "dbg_buf", "dbg_buf->curr" and "dbg_buf->filled_size" could be modified by different threads at the same time, but they are not protected with mutex or locks. Buffer overflow is possible on race conditions. "buffer->curr" itself could also be overwritten, which means that it may point to anywhere of kernel memory (for write).

The bug was discovered 05/01/2017. The weakness was disclosed 05/12/2017 (Website). The advisory is shared for download at codeaurora.org. This vulnerability was named CVE-2017-8244 since 04/25/2017. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 12/23/2020). It is expected to see the exploit prices for this product increasing in the near future.

The vulnerability was handled as a non-public zero-day exploit for at least 11 days. During that time the estimated underground price was around $25k-$100k.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 98547†). The entries VDB-102646, VDB-110201, VDB-110202 and VDB-110203 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.0
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Name: Kernel Memory
Class: Memory corruption / Kernel Memory
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/25/2017 🔍
05/01/2017 +6 days 🔍
05/12/2017 +11 days 🔍
05/12/2017 +0 days 🔍
05/13/2017 +1 days 🔍
05/19/2017 +6 days 🔍
12/23/2020 +1314 days 🔍

Sourcesinfo

Vendor: google.com

Advisory: codeaurora.org
Researcher: CodeAurora
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-8244 (🔍)
GCVE (CVE): GCVE-0-2017-8244
GCVE (VulDB): GCVE-100-101212
SecurityFocus: 98547 - Linux Kernel CVE-2017-8244 Multiple Local Buffer Overflow Vulnerabilities

scip Labs: https://www.scip.ch/en/?labs.20150917
See also: 🔍

Entryinfo

Created: 05/13/2017 09:14
Updated: 12/23/2020 13:42
Changes: 05/13/2017 09:14 (64), 12/30/2019 08:25 (4), 12/23/2020 13:42 (2)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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