Integer Overflow Vulnerability in libssh2 Affects Client Systems
CVE-2019-3855

7.5HIGH

Key Information:

Vendor

The Libssh2 Project

Status
Libssh2
Vendor
CVE Published:
21 March 2019

What is CVE-2019-3855?

An integer overflow flaw has been identified in libssh2 prior to version 1.8.1, specifically in how packets are processed from the server. This vulnerability can be exploited by a remote attacker who gains access to a compromised SSH server, potentially leading to arbitrary code execution on the client system once a user connects. The flaw underscores significant risks associated with using affected versions of libssh2, necessitating immediate updates to safeguard client systems.

Affected Version(s)

libssh2 1.8.1

References

http://www.openwall.com/lists/oss-security/2019/03/18/3
mailing-listx_refsource_MLIST
https://seclists.org/bugtraq/2019/Mar/25
mailing-listx_refsource_BUGTRAQ
https://www.libssh2.org/CVE-2019-3855.html
x_refsource_MISC

EPSS Score

16% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

CVSS V3.0

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.