Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-29923 |
CWE-ID | CWE-20 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
Go programming language Universal components / Libraries / Scripting languages |
Vendor |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU56829
Risk: Medium
CVSSv3.1:
CVE-ID: CVE-2021-29923
CWE-ID:
Exploit availability:
DescriptionThe vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to insufficient validation of user-supplied input in net.ParseIP and net.ParseCIDR, as the Go interpreter does not properly consider extraneous zero characters at the beginning
of an IP address octet. A remote attacker can
bypass access control that is based on IP addresses, because of
unexpected octal interpretation.
Install updates from vendor's website.
Vulnerable software versionsGo programming language: 1.14.15 - 1.16.7
Fixed software versionsCPE2.3 External links
http://github.com/golang/go/issues/43389
http://github.com/golang/go/issues/30999
http://defcon.org/html/defcon-29/dc-29-speakers.html#kaoudis
http://github.com/sickcodes/security/blob/master/advisories/SICK-2021-016.md
http://golang.org/pkg/net/#ParseCIDR
http://go-review.googlesource.com/c/go/+/325829/
Q & A
Can this vulnerability be exploited remotely?
Is there known malware, which exploits this vulnerability?