CVE-2018-3639
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
AMD / ARM / Intel - Speculative Execution Variant 4 Speculative Store Bypass
OS impact
Red Hat Affected 8 releases
| Version | Status | Fixed in |
|---|---|---|
| 7.7 | Affected | — |
| 7.6 | Affected | — |
| 7.5 | Affected | — |
| 7.4 | Affected | — |
| 7.3 | Affected | — |
| 7.0 | Affected | — |
| 6.7 | Affected | — |
| 6.0 | Affected | — |
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Ubuntu Affected 5 releases
| Version | Status | Fixed in |
|---|---|---|
| 18.04 | Affected | — |
| 17.10 | Affected | — |
| 16.04 | Affected | — |
| 14.04 | Affected | — |
| 12.04 | Affected | — |
Windows Affected 8 releases
| Version | Status | Fixed in |
|---|---|---|
| sp2 | Affected | — |
| r2 | Affected | — |
| 1809 | Affected | — |
| 1803 | Affected | — |
| 1709 | Affected | — |
| 1703 | Affected | — |
| 1607 | Affected | — |
| - | Affected | — |
Debian Mixed 7 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 3.20180703.1 |
| sid | Fixed | 3.20180703.1 |
| forky | Fixed | 3.20180703.1 |
| bullseye | Fixed | 3.20180703.1 |
| bookworm | Fixed | 3.20180703.1 |
| 9.0 | Affected | — |
| 8.0 | Affected | — |
Application impact
References
- https://www.suse.com/security/cve/CVE-2018-3639.html
- https://security-tracker.debian.org/tracker/CVE-2018-3639
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00058.html
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00059.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00007.html
- http://support.lenovo.com/us/en/solutions/LEN-22133
- http://www.fujitsu.com/global/support/products/software/security/products-f/cve-2018-3639e.html
- http://www.openwall.com/lists/oss-security/2020/06/10/1
- http://www.openwall.com/lists/oss-security/2020/06/10/2
- http://www.openwall.com/lists/oss-security/2020/06/10/5
- http://www.securityfocus.com/bid/104232
- http://www.securitytracker.com/id/1040949
- http://www.securitytracker.com/id/1042004
- http://xenbits.xen.org/xsa/advisory-263.html
- https://access.redhat.com/errata/RHSA-2018:1629
- https://access.redhat.com/errata/RHSA-2018:1630
- https://access.redhat.com/errata/RHSA-2018:1632
- https://access.redhat.com/errata/RHSA-2018:1633
- https://access.redhat.com/errata/RHSA-2018:1635
- https://access.redhat.com/errata/RHSA-2018:1636
- https://access.redhat.com/errata/RHSA-2018:1637
- https://access.redhat.com/errata/RHSA-2018:1638
- https://access.redhat.com/errata/RHSA-2018:1639
- https://access.redhat.com/errata/RHSA-2018:1640
- https://access.redhat.com/errata/RHSA-2018:1641
CWEs
CWE-203
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.