CVE-2018-10933

Exp

A vulnerability was found in libssh's server-side state machine before versions 0.7.6 and 0.8.4. A malicious client could create channels without first performing authentication, resulting in unauthorized access.

Published: 2018-10-17 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-10933 is rated High Exploit Risk (82.6/100): CVSS Critical severity, with high exploitation likelihood (EPSS 74.91%, 99th percentile). 3 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-10933

EDB-ID Source Kind Published Link
46307 exploit_db edb 2018-10-20 Exploit-DB ↗
45638 exploit_db edb 2018-10-18 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-10933

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-10 78.33% 74.91% -3.42%
2 2026-03-30 78.63% 78.33% -0.30%
3 2026-03-21 — 78.63% —

Full EPSS history (66 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-10933

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.1 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 5.2 [email protected]
9.1 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 5.2 [email protected]
6.4 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 4.9 [email protected]

Weakness enumeration for CVE-2018-10933

OS Trackers for CVE-2018-10933

vendor priority summary link
alpine critical CVE-2018-10933: 1 source package rows (libssh); 9 state rows across 9 repos (3.10-main, 3.11-main, 3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 9, open 0. https://security.alpinelinux.org/vuln/CVE-2018-10933
debian not yet assigned CVE-2018-10933 not yet assigned priority: Debian including 1 source packages (libssh), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-10933
redhat high — https://access.redhat.com/security/cve/CVE-2018-10933
suse critical CVE-2018-10933 severity critical: SUSE including 286 source package names (14.28:libssh4-0.6.3-12.6.1, 15.0:libssh4-0.7.5-6.3.1, …), 387 product×package rows across 59 product lines (Container suse/sle15, Container suse/sles12sp4, … (59 product lines)): Known Affected 157, Fixed 156, Known Not Affected 74. https://www.suse.com/security/cve/CVE-2018-10933/
ubuntu medium CVE-2018-10933 medium priority: Ubuntu including 1 source packages (libssh), 5 status rows across 5 suites (bionic, cosmic, trusty, upstream, xenial): released 4, needs-triage 1. https://ubuntu.com/security/CVE-2018-10933

Affected software / configurations for CVE-2018-10933

Vendor Product Version Raw CPE
libssh libssh >= 0.6.0, < 0.7.6 cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*
libssh libssh >= 0.8.0, < 0.8.4 cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 18.10 cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
redhat enterprise_linux 7.0 cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
netapp oncommand_unified_manager >= 7.3 cpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:windows:*:*
netapp oncommand_unified_manager >= 9.4 cpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:vsphere:*:*
netapp oncommand_workflow_automation — cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
netapp snapcenter — cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*
netapp storage_automation_store — cpe:2.3:a:netapp:storage_automation_store:-:*:*:*:*:*:*:*
oracle mysql_workbench <= 8.0.13 cpe:2.3:a:oracle:mysql_workbench:*:*:*:*:*:*:*:*

References for CVE-2018-10933

URL Tags
http://www.securityfocus.com/bid/105677 Third Party Advisory VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10933 Issue Tracking Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00010.html Mailing List Third Party Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0016 Third Party Advisory
https://security.netapp.com/advisory/ntap-20190118-0002/ Third Party Advisory
https://usn.ubuntu.com/3795-1/ Third Party Advisory
https://usn.ubuntu.com/3795-2/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4322 Third Party Advisory
https://www.exploit-db.com/exploits/45638/ Exploit Third Party Advisory VDB Entry
https://www.libssh.org/security/advisories/CVE-2018-10933.txt Vendor Advisory
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html Patch Third Party Advisory
cvelogic Threat Intelligence