CVE-2019-9894: A remotely triggerable memory overwrite in RSA key exchange in PuTTY before 0.71 can occur before host key verification

High severity · published Mar 21, 2019

CVE-2019-9894

A remotely triggerable memory overwrite in RSA key exchange in PuTTY before 0.71 can occur before host key verification

7.5

CVSS

2.4%

EPSS

On KEV

Description

A remotely triggerable memory overwrite in RSA key exchange in PuTTY before 0.71 can occur before host key verification.

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

None

Integrity

High

Availability

None

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)2.4% · higher than 84% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Debian Linux · Debian

8.0; 9.0 · source: NVD

Fedora · Fedoraproject

28; 29 · source: NVD

Leap · Opensuse

15.0 · source: NVD

Oncommand Unified Manager · Netapp

All versions, or not specified · source: NVD

Putty · Putty

before 0.71 · source: NVD

Affected product

Debian Linux

Debian

All Debian Linux CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2019-9894

CVE.org

https://www.cve.org/CVERecord?id=CVE-2019-9894

Mailing List

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00004.html

Mailing List

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00020.html

Mailing List

https://lists.debian.org/debian-lts-announce/2019/04/msg00023.html

lists.fedoraproject.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36LWQ3NPFIV7DC7TC4KFPRYRH2OR7SZ2/

lists.fedoraproject.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LDO3F267P347E6U2IILFCYW7JPTLCCES/

Mailing List

https://seclists.org/bugtraq/2019/Apr/6