VDB-97305 · CVE-2017-5926 · BID 96457

AMD CPU information disclosure

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.
6.1$0-$5k0.00

Summaryinfo

A vulnerability was found in AMD CPU. It has been classified as critical. Affected is an unknown function. Performing a manipulation results in information disclosure. This vulnerability is known as CVE-2017-5926. Remote exploitation of the attack is possible. No exploit is available. This vulnerability has a historic impact because of its background and how it was received.

Detailsinfo

A vulnerability was found in AMD CPU (Chip Software) (unknown version). It has been classified as critical. This affects an unknown code block. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality, and integrity. The summary by CVE is:

Page table walks conducted by the MMU during virtual to physical address translation leave a trace in the last level cache of modern AMD processors. By performing a side-channel attack on the MMU operations, it is possible to leak data and code pointers from JavaScript, breaking ASLR.

The bug was discovered 02/27/2017. The weakness was published 02/27/2017 (Website). The advisory is shared at cs.vu.nl. This vulnerability is uniquely identified as CVE-2017-5926 since 02/07/2017. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/02/2020). MITRE ATT&CK project uses the attack technique T1592 for this issue. Due to its background and reception, this vulnerability has a historic impact.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 96457†). Similar entries are available at VDB-97304, VDB-97306 and VDB-97307. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.1

VulDB Base Score: 4.8
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
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

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/07/2017 🔍
02/27/2017 +20 days 🔍
02/27/2017 +0 days 🔍
02/27/2017 +0 days 🔍
02/27/2017 +0 days 🔍
02/27/2017 +0 days 🔍
09/02/2020 +1283 days 🔍

Sourcesinfo

Advisory: cs.vu.nl
Status: Not defined

CVE: CVE-2017-5926 (🔍)
GCVE (CVE): GCVE-0-2017-5926
GCVE (VulDB): GCVE-100-97305
SecurityFocus: 96457 - Multiple AMD Processor CVE-2017-5926 Local Security Bypass Vulnerability
OSVDB: - CVE-2017-5926 - MMU - AnC Attack Issue

See also: 🔍

Entryinfo

Created: 02/27/2017 21:05
Updated: 09/02/2020 14:49
Changes: 02/27/2017 21:05 (59), 09/02/2020 14:49 (4)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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