CVE-2019-3863
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…
- 7.5HighCVSS base score
- 3.4%Exploitation in 30 daysEPSS · top 11% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By redhat
- 3 months later
· 3 months later
Published
- 8 years later
· 8 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.0 | High7.5 | CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.0 | High8.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 3.4% · top 11% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
- affected 1.8.1
References
17
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3863 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.libssh2.org/CVE-2019-3863.html (opens in a new tab)x_refsource_MISCx_transferred
- [debian-lts-announce] 20190326 [SECURITY] [DLA 1730-1] libssh2 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://security.netapp.com/advisory/ntap-20190327-0005/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2019:0679 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- openSUSE-SU-2019:1075 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- openSUSE-SU-2019:1109 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- FEDORA-2019-3348cb4934 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- DSA-4431 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- 20190415 [SECURITY] [DSA 4431-1] libssh2 security update (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- RHSA-2019:1175 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2019:1652 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2019:1791 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2019:1943 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2019:2399 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html (opens in a new tab)x_refsource_MISCx_transferred
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2019-13477 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2019-3863)Record last updated .