CVE-2019-9894
First published: Thu Mar 21 2019(Updated: )
A remotely triggerable memory overwrite in RSA key exchange in PuTTY before 0.71 can occur before host key verification.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/putty | 0.70-6 0.74-1 0.78-2 0.79-1 | |
| PuTTY | <0.71 | |
| Fedora | =28 | |
| Fedora | =29 | |
| Debian | =8.0 | |
| Debian | =9.0 | |
| NetApp OnCommand Unified Manager for Windows | ||
| SUSE Linux | =15.0 |
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Reference Links
- https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-rsa-kex-integer-overflow.html
- https://git.tartarus.org/?p=simon/putty.git;a=commitdiff;h=d82854999516046122501b2e145099740ed0284f
- https://security-tracker.debian.org/tracker/CVE-2019-9894
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00020.html
- https://lists.debian.org/debian-lts-announce/2019/04/msg00023.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/36LWQ3NPFIV7DC7TC4KFPRYRH2OR7SZ2/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LDO3F267P347E6U2IILFCYW7JPTLCCES/
- https://seclists.org/bugtraq/2019/Apr/6
- https://security.netapp.com/advisory/ntap-20190404-0001/
- https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
- https://www.debian.org/security/2019/dsa-4423
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LDO3F267P347E6U2IILFCYW7JPTLCCES/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36LWQ3NPFIV7DC7TC4KFPRYRH2OR7SZ2/
Frequently Asked Questions
What is CVE-2019-9894?
CVE-2019-9894 is a vulnerability in PuTTY before version 0.71 that allows for a remotely triggerable memory overwrite in the RSA key exchange process.
How does CVE-2019-9894 affect PuTTY?
CVE-2019-9894 affects PuTTY versions before 0.71, potentially leading to a memory overwrite in the RSA key exchange.
What is the severity of CVE-2019-9894?
The severity of CVE-2019-9894 is high with a CVSS score of 7.5.
Which software versions are affected by CVE-2019-9894?
PuTTY versions before 0.71 are affected by CVE-2019-9894.
How can I fix CVE-2019-9894?
To fix CVE-2019-9894, update PuTTY to version 0.71 or later.
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