Denial of service in Bitvise FlowSsh Library

Published: 2018-05-22

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	N/A
CWE-ID	CWE-119 CWE-362
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	FlowSsh Library Universal components / Libraries / Libraries used by multiple products
Vendor	Bitvise

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Memory corruption

EUVDB-ID: #VU12915

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: N/A

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.

The weakness exists due to an invalid memory access error. A remote attacker can return a specially crafted packet and cause the service to crash.

Mitigation

Update to version 7.41.

Vulnerable software versions

FlowSsh Library: 5.27 - 7.39

CPE2.3

External links

https://www.bitvise.com/flowssh-version-history#security-notification-741

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Race condition

EUVDB-ID: #VU12916