Back
CVE-2019-3855
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read…
High7.5EPSS 9.3%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.
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 | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 9.3% · top 4.6% of all CVEs (5 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
- affected 1.8.1
References (28)
- [oss-security] 20190318 [SECURITY ADVISORIES] libssh2 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 20190319 [slackware-security] libssh2 (SSA:2019-077-01) (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- https://www.libssh2.org/CVE-2019-3855.html (opens in a new tab)x_refsource_MISCx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3855 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html (opens in a new tab)x_refsource_MISCx_transferred
- 107485 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- FEDORA-2019-f31c14682f (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-767 (opens in a new tab)x_refsource_CONFIRMx_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
- FEDORA-2019-9d85600fc7 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2019-5885663621 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- RHSA-2019:2399 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://support.apple.com/kb/HT210609 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 20190927 APPLE-SA-2019-9-26-7 Xcode 11.0 (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20190927 APPLE-SA-2019-9-26-7 Xcode 11.0 (opens in a new tab)mailing-listx_refsource_FULLDISCx_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)
- 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://trackcve.app/cve/CVE-2019-3855)Record last updated .