Denial of service in Go Crypto



| Updated: 2022-11-21
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-9283
CWE-ID CWE-617
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 crypto
Universal components / Libraries / Libraries used by multiple products

Vendor Google

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Reachable Assertion

EUVDB-ID: #VU69447

Risk: Medium

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2020-9283

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion during signature verification process. A remote attacker can supply a specially crafted certificate to the application (server or client) and perform a denial of service (DoS) attack.


Mitigation

Install updates from vendor's website.

Vulnerable software versions

crypto: before 0.0.0-20200220183623-bac4c82f6975

CPE2.3 External links

https://groups.google.com/forum/#!topic/golang-announce/3L45YRc91SY
https://packetstormsecurity.com/files/156480/Go-SSH-0.0.2-Denial-Of-Service.html
https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html
https://lists.debian.org/debian-lts-announce/2020/11/msg00027.html
https://lists.debian.org/debian-lts-announce/2020/11/msg00031.html
https://packetstormsecurity.com/files/156480/Go-SSH-0.0.2-Denial-Of-Service.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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