Resource management error in PuTTY - CVE-2019-17069

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Main Vulnerability Database Vulnerabilities #VU21598

Resource management error in PuTTY - CVE-2019-17069

Published: October 7, 2019


Vulnerability identifier: #VU21598
CSH Severity: Low
CVSS v4: 1.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-17069
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an error when processing SSH1_MSG_DISCONNECT message. A remote attacker can trick the victim to connect to a remote SSH-1 server, send a specially crafted SSH1_MSG_DISCONNECT message and crash the affected PuTTY client.


Affected software

PuTTY
putty (Alpine package)
SUSE Linux
Opensuse

How to mitigate CVE-2019-17069

Install updates from vendor's website.

PuTTY - update to 0.73
putty (Alpine package) - update to 0.73-r0

External References

Related Security Bulletins