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hpHP, HP Product Security Response Team (PSRT)HP:C06179472
HistoryNov 02, 2018 - 12:00 a.m.

HPSBHF03597 rev. 3 - PortSmash Side-Channel Vulnerability

2018-11-0200:00:00
HP, HP Product Security Response Team (PSRT)
support.hp.com
11

4.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

1.9 Low

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:M/Au:N/C:P/I:N/A:N

Potential Security Impact

Information disclosure.

Source: HP, HP Product Security Response Team (PSRT)

Reported By: Tampere University of Technology, Finland and Technical University, Cuba

VULNERABILITY SUMMARY

An industry-wide vulnerability has been reported which impacts CPUs that use Simultaneous Multithreading Technology (SMT). The attack consists of running a malicious process in parallel with legitimate processes using the parallel threading capabilities of SMT. The legitimate process leaks small amounts of data to the malicious processes, which could allow an attacker to reconstruct the data that was inside the legitimate process.

RESOLUTION

HP worked with industry partners to analyze the researcher’s findings. Software written using safe algorithms to prevent side channel analysis are not vulnerable to the researchers’ methods. The firmware shipped on HP platforms is not vulnerable to this issue; there will not be any firmware updates published with this security bulletin.

Additional Resources:

AMD article on PortSmash mitigations__ (in English)

4.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

1.9 Low

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:M/Au:N/C:P/I:N/A:N