CVE catalog
CVE-2019-3863
libssh2: CVE-2019-3863
- Severity
- High · CVSS 8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 3.44% · Oct 25, 2026
A flaw was found in libssh2 before 1.8.1 creating a vulnerability on the SSH client side. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used by the SSH client as an index to copy memory causing in an out of bounds memory write error.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libssh2 | sid | 1.11.1-6 | fixed |
| Debian | libssh2 | forky | 1.11.1-6 | fixed |
| Debian | libssh2 | trixie | 1.11.1-1+deb13u2 | fixed |
| Debian | libssh2 | trixie-security | 1.11.1-1+deb13u1 | fixed |
| Debian | libssh2 | bookworm | 1.10.0-3 | fixed |
| Debian | libssh2 | bookworm-security | 1.10.0-3+deb12u1 | fixed |
| Cpe | libssh2 | Not reported | 1.8.1 | fixed |
| Cpe | debian_linux | Not reported | Not reported | unknown |
| Cpe | ontap_select_deploy_administration_utility | Not reported | Not reported | unknown |
| Cpe | leap | Not reported | Not reported | unknown |
| Cpe | enterprise_linux_desktop | Not reported | Not reported | unknown |
| Cpe | enterprise_linux_server | Not reported | Not reported | unknown |
| Cpe | enterprise_linux_server_aus | Not reported | Not reported | unknown |
| Cpe | enterprise_linux_server_eus | Not reported | Not reported | unknown |
| Cpe | enterprise_linux_server_tus | Not reported | Not reported | unknown |
| Cpe | enterprise_linux_workstation | Not reported | Not reported | unknown |
| Ubuntu | libssh2 | pro | 1.8.0-1 | vulnerable |
| Ubuntu | libssh2 | pro | 1.8.0-1ubuntu0.1 | vulnerable |
| Ubuntu | libssh2 | pro | 1.8.0-1ubuntu0.1+esm1 | vulnerable |
| Alpine | libssh2 | 3.10 | 1.8.1-r0 | fixed |
| Alpine | libssh2 | 3.11 | 1.8.1-r0 | fixed |
| Alpine | libssh2 | 3.12 | 1.8.1-r0 | fixed |
| Alpine | libssh2 | 3.13 | 1.8.1-r0 | fixed |
| Alpine | libssh2 | 3.14 | 1.8.1-r0 | fixed |
| Alpine | libssh2 | 3.15 | 1.8.1-r0 | fixed |
| Alpine | libssh2 | 3.16 | 1.8.1-r0 | fixed |
| Alpine | libssh2 | 3.17 | 1.8.1-r0 | fixed |
| Alpine | libssh2 | 3.18 | 1.8.1-r0 | fixed |
| Alpine | libssh2 | 3.19 | 1.8.1-r0 | fixed |
| Alpine | libssh2 | 3.20 | 1.8.1-r0 | fixed |
| Alpine | libssh2 | 3.21 | 1.8.1-r0 | fixed |
| Alpine | libssh2 | 3.22 | 1.8.1-r0 | fixed |
| Alpine | libssh2 | 3.23 | 1.8.1-r0 | fixed |
| Alpine | libssh2 | 3.24 | 1.8.1-r0 | fixed |
| Alpine | libssh2 | 3.9 | 1.8.1-r0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libssh2 | source | sid | 1.8.0-2.1 | not yet assigned | Not reported | [924965] |
| Debian | libssh2 | source | forky | 1.8.0-2.1 | not yet assigned | Not reported | [924965] |
| Debian | libssh2 | source | trixie | 1.8.0-2.1 | not yet assigned | Not reported | [924965] |
| Debian | libssh2 | source | bookworm | 1.8.0-2.1 | not yet assigned | Not reported | [924965] |
| Cpe | libssh2 | cpe | Not reported | 1.8.1 | Not reported | NVD-CVE-2019-3863 | Not reported |
| Alpine | libssh2 | apk | 3.10 | 1.8.1-r0 | Not reported | ALPINE-CVE-2019-3863 | Not reported |
| Alpine | libssh2 | apk | 3.11 | 1.8.1-r0 | Not reported | ALPINE-CVE-2019-3863 | Not reported |
| Alpine | libssh2 | apk | 3.12 | 1.8.1-r0 | Not reported | ALPINE-CVE-2019-3863 | Not reported |
| Alpine | libssh2 | apk | 3.13 | 1.8.1-r0 | Not reported | ALPINE-CVE-2019-3863 | Not reported |
| Alpine | libssh2 | apk | 3.14 | 1.8.1-r0 | Not reported | ALPINE-CVE-2019-3863 | Not reported |
| Alpine | libssh2 | apk | 3.15 | 1.8.1-r0 | Not reported | ALPINE-CVE-2019-3863 | Not reported |
| Alpine | libssh2 | apk | 3.16 | 1.8.1-r0 | Not reported | ALPINE-CVE-2019-3863 | Not reported |
| Alpine | libssh2 | apk | 3.17 | 1.8.1-r0 | Not reported | ALPINE-CVE-2019-3863 | Not reported |
| Alpine | libssh2 | apk | 3.18 | 1.8.1-r0 | Not reported | ALPINE-CVE-2019-3863 | Not reported |
| Alpine | libssh2 | apk | 3.19 | 1.8.1-r0 | Not reported | ALPINE-CVE-2019-3863 | Not reported |
| Alpine | libssh2 | apk | 3.20 | 1.8.1-r0 | Not reported | ALPINE-CVE-2019-3863 | Not reported |
| Alpine | libssh2 | apk | 3.21 | 1.8.1-r0 | Not reported | ALPINE-CVE-2019-3863 | Not reported |
| Alpine | libssh2 | apk | 3.22 | 1.8.1-r0 | Not reported | ALPINE-CVE-2019-3863 | Not reported |
| Alpine | libssh2 | apk | 3.23 | 1.8.1-r0 | Not reported | ALPINE-CVE-2019-3863 | Not reported |
| Alpine | libssh2 | apk | 3.24 | 1.8.1-r0 | Not reported | ALPINE-CVE-2019-3863 | Not reported |
| Alpine | libssh2 | apk | 3.9 | 1.8.1-r0 | Not reported | ALPINE-CVE-2019-3863 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [libssh2-1]Unknown
Source package: [libssh2]
Details (2)
1.10.0-3+b1· amd64 · bookwormFixed · Fixed:
1.8.0-2.1dsa · libssh2 · debian · bookworm
1.10.0-3+b1· arm64 · bookwormFixed · Fixed:
1.8.0-2.1dsa · libssh2 · debian · bookworm
- [libssh2-1-dev]Unknown
Source package: [libssh2]
Details (2)
1.10.0-3+b1· amd64 · bookwormFixed · Fixed:
1.8.0-2.1dsa · libssh2 · debian · bookworm
1.10.0-3+b1· arm64 · bookwormFixed · Fixed:
1.8.0-2.1dsa · libssh2 · debian · bookworm
Observed:
References
- [https://cert-portal.siemens.com/productcert/csaf/ssa-398330.json]
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2019_0679.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2019-3863]
- [https://osv.dev/vulnerability/ALPINE-CVE-2019-3863]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2019-3863]
- [https://security-tracker.debian.org/tracker/CVE-2019-3863]
- [https://security.access.redhat.com/data/csaf/v2/vex/2019/cve-2019-3863.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2019/wid-sec-w-2023-1230.json]
[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]