Gentoo update for OpenSSH
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2020-14145 CVE-2021-28041 |
| CWE-ID | CWE-327 CWE-415 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Gentoo Linux Operating systems & Components / Operating system |
| Vendor | Gentoo |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Use of a broken or risky cryptographic algorithm
EUVDB-ID: #VU32937
Risk: Medium
CVSSv3.1: 4.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-14145
CWE-ID:
CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists in openssh client during algorithm negotiation due to observable discrepancy. A remote attacker can perform a Man-in-the-Middle (MitM) attack.
Update the affected packages.
net-misc/openssh to version:
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/202105-35
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Double Free
EUVDB-ID: #VU51444
Risk: Medium
CVSSv3.1: 6.2 [CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-28041
CWE-ID:
CWE-415 - Double Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in ssh-agent. A remote attacker can trick the victim to connect to a server, where the attacker has root privileges, pass specially crafted data to the ssh client, trigger a double free error and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationUpdate the affected packages.
net-misc/openssh to version:
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/202105-35
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
