Home/CVE/Go before 1.17 does not properly consider extraneous zero characters at the beginning of an IP address octet, which (in
CVE

CVE-2021-29923

Go before 1.17 does not properly consider extraneous zero characters at the beginning of an IP address octet, which (in

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.

HIGH · CVSS 7.5 EPSS 0.00254
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
▤

Affected Products & Versions

3
golang go< 1.17
oracle timesten in-memory database< 21.1.1.1.0
fedoraproject fedoraall versions
⚠

Public Exploits & PoCs

2
pocgithub.com · 30999github.com
pocgithub.com · SICK-2021-016.mdgithub.com
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD07 Aug 2021 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
⚑

Vendor Advisories

25
rhsaRHSA-2022:0947Moderate
rhsaRHSA-2022:1276Important
rhsaRHSA-2022:0318Moderate
rhsaRHSA-2022:0557Important
rhsaRHSA-2022:0237Important
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://defcon.org/html/defcon-29/dc-29-speakers.html#kaoudisThird Party Advisory
https://github.com/golang/go/issues/43389Issue TrackingThird Party Advisory
https://go-review.googlesource.com/c/go/+/325829/PatchThird Party Advisory
https://golang.org/pkg/net/#ParseCIDRVendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4CHKSFMHZVOBCZSSVRE3UEYNKARTBMTM/
https://security.gentoo.org/glsa/202208-02Third Party Advisory
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