MEDIUM
CVE-2019-3858
CWE-125Published: March 21, 2019· Updated: Jun 17, 2026
5.0
CVSS v3.1
Official Description
An out of bounds read flaw was discovered in libssh2 before 1.8.1 when a specially crafted SFTP packet is received from the server. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.
Technical Analysis
CVE-2019-3858 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityLow
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (34)
→
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.htmlMailing List · Third Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.htmlThird Party Advisory
→
http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.htmlThird Party Advisory · VDB Entry
→
http://www.openwall.com/lists/oss-security/2019/03/18/3Mailing List · Patch · Third Party Advisory
→
http://www.securityfocus.com/bid/107485Third Party Advisory · VDB Entry
→
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3858Issue Tracking · Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2019/03/msg00032.htmlMailing List · Third Party Advisory
→
https://seclists.org/bugtraq/2019/Mar/25Mailing List · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20190327-0005/Third Party Advisory
→
Quick Facts
CVE IDCVE-2019-3858
CVSS Score5.0 / 10
SeverityMEDIUM
WeaknessCWE-125
CISA KEVNo
Affected5 vendor(s)
PublishedMar 21, 2019
Related CVEs (CWE-125)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-3858 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.