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CVE
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CVE-2021-29923Date: (C)2021-08-09   (M)2023-12-22


Go before 1.17 does not properly consider extraneous zero characters at the beginning of an IP address octet, which (in some situations) allows attackers to bypass access control that is based on IP addresses, because of unexpected octal interpretation. This affects net.ParseIP and net.ParseCIDR.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 7.5CVSS Score : 5.0
Exploit Score: 3.9Exploit Score: 10.0
Impact Score: 3.6Impact Score: 2.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: NETWORKAccess Vector: NETWORK
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: NONEAuthentication: NONE
User Interaction: NONEConfidentiality: NONE
Scope: UNCHANGEDIntegrity: PARTIAL
Confidentiality: NONEAvailability: NONE
Integrity: HIGH 
Availability: NONE 
  
Reference:
FEDORA-2022-17d004ed71
GLSA-202208-02
https://defcon.org/html/defcon-29/dc-29-speakers.html#kaoudis
https://github.com/golang/go/issues/30999
https://github.com/golang/go/issues/43389
https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-016.md
https://go-review.googlesource.com/c/go/+/325829/
https://golang.org/pkg/net/#ParseCIDR
https://www.oracle.com/security-alerts/cpujan2022.html

CPE    1
cpe:/a:golang:go
OVAL    6
oval:org.secpod.oval:def:506348
oval:org.secpod.oval:def:4501372
oval:org.secpod.oval:def:75903
oval:org.secpod.oval:def:1505124
...

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