Siemens SIMATIC Spectre-NG (Variants 3a and 4) (CVE-2018-3639)

medium Tenable OT Security Plugin ID 500248


The remote OT asset is affected by a vulnerability.


Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB), Variant 4.

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Refer to the vendor advisory.

See Also

Plugin Details

Severity: Medium

ID: 500248

Version: 1.4

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 11/15/2023

Supported Sensors: Nessus

Risk Information


Risk Factor: Medium

Score: 6.7


Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2018-3639


Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:siemens:simatic_et_200_sp_firmware, cpe:/o:siemens:simatic_s7-1500_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/22/2018

Vulnerability Publication Date: 5/22/2018

Reference Information

CVE: CVE-2018-3639

CWE: 203

CERT: TA18-141A

DSA: DSA-4210, DSA-4273

RHSA: RHSA-2018:1629, RHSA-2018:1630, RHSA-2018:1632, RHSA-2018:1633, RHSA-2018:1635, RHSA-2018:1636, RHSA-2018:1637, RHSA-2018:1638, RHSA-2018:1639, RHSA-2018:1640, RHSA-2018:1641, RHSA-2018:1642, RHSA-2018:1643, RHSA-2018:1644, RHSA-2018:1645, RHSA-2018:1646, RHSA-2018:1647, RHSA-2018:1648, RHSA-2018:1649, RHSA-2018:1650, RHSA-2018:1651, RHSA-2018:1652, RHSA-2018:1653, RHSA-2018:1654, RHSA-2018:1655, RHSA-2018:1656, RHSA-2018:1657, RHSA-2018:1658, RHSA-2018:1659, RHSA-2018:1660, RHSA-2018:1661, RHSA-2018:1662, RHSA-2018:1663, RHSA-2018:1664, RHSA-2018:1665, RHSA-2018:1666, RHSA-2018:1667, RHSA-2018:1668, RHSA-2018:1669, RHSA-2018:1674, RHSA-2018:1675, RHSA-2018:1676, RHSA-2018:1686, RHSA-2018:1688, RHSA-2018:1689, RHSA-2018:1690, RHSA-2018:1696, RHSA-2018:1710, RHSA-2018:1711, RHSA-2018:1737, RHSA-2018:1738, RHSA-2018:1826, RHSA-2018:1854, RHSA-2018:1965, RHSA-2018:1967, RHSA-2018:1997, RHSA-2018:2001, RHSA-2018:2003, RHSA-2018:2006, RHSA-2018:2060, RHSA-2018:2161, RHSA-2018:2162, RHSA-2018:2164, RHSA-2018:2171, RHSA-2018:2172, RHSA-2018:2216, RHSA-2018:2228, RHSA-2018:2246, RHSA-2018:2250, RHSA-2018:2258, RHSA-2018:2289, RHSA-2018:2309, RHSA-2018:2328, RHSA-2018:2363, RHSA-2018:2364, RHSA-2018:2387, RHSA-2018:2394, RHSA-2018:2396, RHSA-2018:2948, RHSA-2018:3396, RHSA-2018:3397, RHSA-2018:3398, RHSA-2018:3399, RHSA-2018:3400, RHSA-2018:3401, RHSA-2018:3402, RHSA-2018:3407, RHSA-2018:3423, RHSA-2018:3424, RHSA-2018:3425, RHSA-2019:0148, RHSA-2019:1046

SuSE: openSUSE-SU-2019:1438, openSUSE-SU-2019:1439, openSUSE-SU-2020:1325

USN: USN-3651-1, USN-3652-1, USN-3653-1, USN-3653-2, USN-3654-1, USN-3654-2, USN-3655-1, USN-3655-2, USN-3679-1, USN-3680-1, USN-3756-1, USN-3777-3