critical
CVE-2018-10933
libssh: Authentication Bypass due to improper message callbacks implementation
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.
Severity by source
NVD9.1CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Red Hat9.1CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Red Hat (high), Ubuntu (medium).
Description
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.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| alpine 3.10 | libssh | 0.7.6-r0 |
| alpine 3.11 | libssh | 0.7.6-r0 |
| alpine 3.12 | libssh | 0.7.6-r0 |
| alpine 3.13 | libssh | 0.7.6-r0 |
| alpine 3.14 | libssh | 0.7.6-r0 |
| alpine 3.15 | libssh | 0.7.6-r0 |
| alpine 3.16 | libssh | 0.7.6-r0 |
| alpine 3.17 | libssh | 0.7.6-r0 |
| alpine 3.18 | libssh | 0.7.6-r0 |
| alpine 3.19 | libssh | 0.7.6-r0 |
| alpine 3.20 | libssh | 0.7.6-r0 |
| alpine 3.21 | libssh | 0.7.6-r0 |
Show all 36 entries from 36 sources
| Source | Package | Fixed in |
|---|---|---|
| alpine 3.10 | libssh | 0.7.6-r0 |
| alpine 3.11 | libssh | 0.7.6-r0 |
| alpine 3.12 | libssh | 0.7.6-r0 |
| alpine 3.13 | libssh | 0.7.6-r0 |
| alpine 3.14 | libssh | 0.7.6-r0 |
| alpine 3.15 | libssh | 0.7.6-r0 |
| alpine 3.16 | libssh | 0.7.6-r0 |
| alpine 3.17 | libssh | 0.7.6-r0 |
| alpine 3.18 | libssh | 0.7.6-r0 |
| alpine 3.19 | libssh | 0.7.6-r0 |
| alpine 3.20 | libssh | 0.7.6-r0 |
| alpine 3.21 | libssh | 0.7.6-r0 |
| alpine 3.22 | libssh | 0.7.6-r0 |
| alpine 3.23 | libssh | 0.7.6-r0 |
| alpine 3.24 | libssh | 0.7.6-r0 |
| alpine 3.5 | libssh | 0.7.6-r0 |
| alpine 3.6 | libssh | 0.7.6-r0 |
| alpine 3.7 | libssh | 0.7.6-r0 |
| alpine 3.8 | libssh | 0.7.6-r0 |
| alpine 3.9 | libssh | 0.7.6-r0 |
| alpine edge | libssh | 0.7.6-r0 |
| debian 11 | libssh | 0.8.4-1 |
| debian 12 | libssh | 0.8.4-1 |
| debian 13 | libssh | 0.8.4-1 |
| debian 14 | libssh | 0.8.4-1 |
| debian 8 | libssh | 0.6.3-4+deb8u3 |
| debian 9 | libssh | 0.7.3-2+deb9u1 |
| echo | libssh | 0.8.4-1 |
| root.io debian 11 | rootio-libssh | 0.8.4-1 |
| root.io debian 12 | rootio-libssh | 0.8.4-1 |
| ubuntu 14.04 | libssh | 0.6.1-0ubuntu3.4 |
| ubuntu 16.04 | libssh | 0.6.3-4.3ubuntu0.1 |
| ubuntu 16.04-ESM | libssh | 0.6.3-4.3ubuntu0.1 |
| ubuntu 18.04 | libssh | 0.8.0~20170825.94fa1e38-1ubuntu0.1 |
| ubuntu 18.04-ESM | libssh | 0.8.0~20170825.94fa1e38-1ubuntu0.1 |
| ubuntu 18.10 | libssh | 0.8.1-1ubuntu0.1 |
References
- http://www.securityfocus.com/bid/105677
- https://access.redhat.com/security/cve/CVE-2018-10933
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10933
- https://lists.debian.org/debian-lts-announce/2018/10/msg00010.html
- https://nvd.nist.gov/vuln/detail/CVE-2018-10933
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0016
- https://security.netapp.com/advisory/ntap-20190118-0002/
- https://ubuntu.com/security/notices/USN-3795-1
All 17 references
- https://ubuntu.com/security/notices/USN-3795-2
- https://usn.ubuntu.com/3795-1/
- https://usn.ubuntu.com/3795-2/
- https://www.cve.org/CVERecord?id=CVE-2018-10933
- https://www.debian.org/security/2018/dsa-4322
- https://www.exploit-db.com/exploits/45638/
- https://www.libssh.org/2018/10/16/libssh-0-8-4-and-0-7-6-security-and-bugfix-release/
- https://www.libssh.org/security/advisories/CVE-2018-10933.txt
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html