FreeBSD up to 6.1 on AMD K7/K8 FXSAVE cryptographic issue

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CTI Interest Score
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3.9$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in FreeBSD up to 6.1 on AMD K7/K8. Affected by this issue is some unknown functionality of the component FXSAVE. This manipulation causes cryptographic issue. The identification of this vulnerability is CVE-2006-1056. There is no exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability classified as problematic was found in FreeBSD up to 6.1 on AMD K7/K8 (Operating System). Affected by this vulnerability is some unknown functionality of the component FXSAVE. The manipulation with an unknown input leads to a cryptographic issue vulnerability. The CWE definition for the vulnerability is CWE-310. As an impact it is known to affect confidentiality. The summary by CVE is:

The Linux kernel before 2.6.16.9 and the FreeBSD kernel, when running on AMD64 and other 7th and 8th generation AuthenticAMD processors, only save/restore the FOP, FIP, and FDP x87 registers in FXSAVE/FXRSTOR when an exception is pending, which allows one process to determine portions of the state of floating point instructions of other processes, which can be leveraged to obtain sensitive information such as cryptographic keys. NOTE: this is the documented behavior of AMD64 processors, but it is inconsistent with Intel processers in a security-relevant fashion that was not addressed by the kernels.

The weakness was shared 04/19/2006 by Jan Beulich (Website). It is possible to read the advisory at ftp.freebsd.org. This vulnerability is known as CVE-2006-1056 since 03/07/2006. The attack can only be initiated within the local network. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 79511 (OracleVM 3.1 : xen (OVMSA-2013-0043)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family OracleVM Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 117692 (CentOS Security Update for Kernel (CESA-2006:0579)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at ftp.FreeBSD.org. A possible mitigation has been published 8 years after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (25871), Tenable (79511), SecurityFocus (BID 17600†), OSVDB (24807†) and Secunia (SA22876†). The entries VDB-1775, VDB-2108, VDB-2182 and VDB-26613 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 3.9

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Class: Cryptographic issue
CWE: CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 79511
Nessus Name: OracleVM 3.1 : xen (OVMSA-2013-0043)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 56956
OpenVAS Name: Debian Security Advisory DSA 1097-1 (kernel-source-2.4.27)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: ftp.FreeBSD.org

Timelineinfo

03/07/2006 🔍
04/19/2006 +43 days 🔍
04/19/2006 +0 days 🔍
04/19/2006 +0 days 🔍
04/19/2006 +0 days 🔍
04/20/2006 +0 days 🔍
05/02/2006 +12 days 🔍
11/14/2006 +196 days 🔍
06/04/2013 +2394 days 🔍
11/26/2014 +540 days 🔍
04/27/2019 +1613 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: ftp.freebsd.org
Researcher: Jan Beulich
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-1056 (🔍)
GCVE (CVE): GCVE-0-2006-1056
GCVE (VulDB): GCVE-100-2179

OVAL: 🔍

X-Force: 25871 - Multiple kernel AMD K7/K8 CPUs floating-point unit information disclosure, Low Risk
SecurityFocus: 17600 - Multiple Vendor AMD CPU Local FPU Information Disclosure Vulnerability
Secunia: 22876 - VMware ESX Server x87 Register Information Leak, Not Critical
OSVDB: 24807 - Linux Kernel x87 Register Information Disclosure
SecurityTracker: 1015966
Vupen: ADV-2006-4353

See also: 🔍

Entryinfo

Created: 05/02/2006 11:36
Updated: 04/27/2019 12:02
Changes: 05/02/2006 11:36 (96), 04/27/2019 12:02 (1)
Complete: 🔍
Cache ID: 216:561:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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