Intel CPU MDSUM information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Intel CPU. It has been classified as critical. This vulnerability affects unknown code of the component MDSUM. This manipulation causes information disclosure. This vulnerability is registered as CVE-2019-11091. The attack needs to be launched locally. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Intel CPU (Chip Software) (unknown version). It has been declared as critical. Affected by this vulnerability is an unknown code block of the component MDSUM. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality.

The bug was discovered 05/14/2019. The weakness was published 05/14/2019 as INTEL-SA-00233 as confirmed security advisory (Website). The advisory is shared at intel.com. This vulnerability is known as CVE-2019-11091 since 04/11/2019. An attack has to be approached locally. The requirement for exploitation is a single authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue. The advisory points out:

Microarchitectural Data Sampling Uncacheable Memory (MDSUM): Uncacheable memory on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access.

The vulnerability scanner Nessus provides a plugin with the ID 209571 (Oracle Linux 8 : virt:kvm_utils3 (ELSA-2024-12792)), which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 172312 (SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2019:1243-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (209571) and SecurityFocus (BID 108299†). Similar entries are available at VDB-134856, VDB-134857, VDB-134858 and VDB-134859. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Intel): 3.8
Vendor Vector (Intel): 🔍

NVD Base Score: 5.6
NVD Vector: 🔍

ADP CISA Base Score: 5.6
ADP CISA Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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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Nessus ID: 209571
Nessus Name: Oracle Linux 8 : virt:kvm_utils3 (ELSA-2024-12792)

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

04/11/2019 🔍
05/10/2019 +29 days 🔍
05/14/2019 +4 days 🔍
05/14/2019 +0 days 🔍
05/14/2019 +0 days 🔍
06/19/2019 +36 days 🔍
05/29/2026 +2536 days 🔍

Sourcesinfo

Vendor: intel.com

Advisory: INTEL-SA-00233
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-11091 (🔍)
GCVE (CVE): GCVE-0-2019-11091
GCVE (VulDB): GCVE-100-136645
SecurityFocus: 108299 - Linux Kernel 'net/bluetooth/hidp/sock.c' Local Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 06/19/2019 14:19
Updated: 05/29/2026 06:10
Changes: 06/19/2019 14:19 (73), 06/25/2020 15:52 (5), 10/06/2023 11:24 (4), 10/26/2024 21:14 (16), 05/29/2026 06:10 (12)
Complete: 🔍
Cache ID: 216::103

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