by Kastro
Paper/Archive/CVE-2019-3861

CVE-2019-3861

The libssh2 Project libssh2 — An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SSH packets with a padding length value greater than the pac…

EPSS 5%CVSS 9.1
critical.is priorityof 100
46
CVSS 9.1 (NVD)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 92.4.924 × 2018.5No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SSH packets with a padding length value greater than the packet length are parsed. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.

Affected

ProductAffectedFixed inSource
libssh21.8.1–CNA
SIMATIC S7-1500 CPU 1518-4 PN/DP MFPV3.1.0 – < V3.1.5V3.1.5siemens-SADP
SIMATIC S7-1500 CPU 1518-4 PN/DP MFPV3.1.0 – < V3.1.5V3.1.5siemens-SADP
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPV3.1.0 – < V3.1.5V3.1.5siemens-SADP
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPV3.1.0 – < V3.1.5V3.1.5siemens-SADP
SIPLUS S7-1500 CPU 1518-4 PN/DP MFPV3.1.0 – < V3.1.5V3.1.5siemens-SADP

Scores by source

NVD9.1CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
redhat (CNA)5.0CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

References

reflibssh2.org/CVE-2019-3861.htmlrefbugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3861reflists.debian.org/debian-lts-announce/2019/03/msg00032.htmlrefsecurity.netapp.com/advisory/ntap-20190327-0005advisorylists.opensuse.org/opensuse-security-announce/2019-03/msg00040.htmladvisorylists.opensuse.org/opensuse-security-announce/2019-04/msg00003.htmladvisorylists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2Oadvisorydebian.org/security/2019/dsa-4431refseclists.org/bugtraq/2019/Apr/25advisoryaccess.redhat.com/errata/RHSA-2019:2136reforacle.com/technetwork/security-advisory/cpuoct2019-5072832.htmlrefcert-portal.siemens.com/productcert/html/ssa-398330.html