Risk | Low |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2019-16905 |
CWE-ID | CWE-190 |
Exploitation vector | Local |
Public exploit | N/A |
Vulnerable software Subscribe |
OpenSSH Server applications / Remote management servers, RDP, SSH |
Vendor | OpenSSH |
Security Bulletin
This security bulletin contains one low risk vulnerability.
EUVDB-ID: #VU22277
Risk: Low
CVSSv3.1: 6.1 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-16905
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to integer overflow within the XMSS key parsing algorithm. A local user can configure the server or client to use a specially crafted XMSS private key, trigger integer overflow and execute arbitrary code on the target system with elevated privileges.
MitigationInstall updates from vendor's website.
Vulnerable software versionsOpenSSH: 7.8p1 - 8.0p1
External linkshttp://0day.life/exploits/0day-1009.html
http://bugzilla.suse.com/show_bug.cgi?id=1153537
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshkey-xmss.c
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshkey-xmss.c.diff?r1=1.5&r2=1.6&f=h
http://security.netapp.com/advisory/ntap-20191024-0003/
http://ssd-disclosure.com/archives/4033/ssd-advisory-openssh-pre-auth-xmss-integer-overflow
http://www.openssh.com/releasenotes.html
http://www.openwall.com/lists/oss-security/2019/10/09/1
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.