Multiple vulnerabilities in OpenSSH
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | N/A |
| CWE-ID | CWE-119 CWE-415 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
OpenSSH Server applications / Remote management servers, RDP, SSH |
| Vendor | OpenSSH |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Buffer overflow
EUVDB-ID: #VU67904
Risk: Low
CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error when processing SSH banners in ssh-keyscan(1). A remote attacker can use a specially crafted banner to trigger a one-byte buffer overflow and perform a denial of service (DoS) attack.
Mitigation
Install updates from vendor's website.
Vulnerable software versionsOpenSSH: 6.0 - 9.0p1
External linkshttp://www.openssh.com/releasenotes.html#9.1
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
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.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Double Free
EUVDB-ID: #VU67905
Risk: Low
CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-415 - Double Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in ssh-keygen(1) when reading files. A remote attacker can trick the victim into using a specially crafted file to trigger a double free error when handling the path of file hashing step in signing/verify code and crash the application.
Install updates from vendor's website.
Vulnerable software versionsOpenSSH: 6.0 - 9.0p1
External linkshttp://www.openssh.com/releasenotes.html#9.1
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
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.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Double Free
EUVDB-ID: #VU67906
Risk: Low
CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-415 - Double Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The
vulnerability exists due to a boundary error in ssh-keysign(8) when
reading files. A remote attacker can trick the victim into using a
specially crafted file to trigger a double free error and crash the
application.
Install updates from vendor's website.
Vulnerable software versionsOpenSSH: 8.9p1 - 9.0p1
External linkshttp://www.openssh.com/releasenotes.html#9.1
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
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.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
