CVE-2021-29923

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 v3.1

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v2.0

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N

EPSS

3.77% chance of exploitation in the next 30 days, 89th percentile

Published

2021-08-07

Updated

2024-08-03

Proof-of-concept exploits (1)

• sickcodes/security/blob/master/advisories/SICK-2021-016.md

References

• CVE Record
• NVD entry

Related

• CVE-2020-25507
• CVE-2020-27402
• CVE-2020-27403
• CVE-2021-28918
• CVE-2021-29662
• CVE-2021-29921