CVE-2021-29923
Cisco Go IP Address Parse Octal Interpretation Vulnerability
Description
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.
INFO
Published Date :
Aug. 7, 2021, 5:15 p.m.
Last Modified :
Nov. 7, 2023, 3:32 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2021-29923 has a 6 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2021-29923
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-29923.
| URL | Resource |
|---|---|
| https://defcon.org/html/defcon-29/dc-29-speakers.html#kaoudis | Third Party Advisory |
| https://github.com/golang/go/issues/30999 | Exploit Issue Tracking Third Party Advisory |
| https://github.com/golang/go/issues/43389 | Issue Tracking Third Party Advisory |
| https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-016.md | Exploit Third Party Advisory |
| https://go-review.googlesource.com/c/go/+/325829/ | Patch Third Party Advisory |
| https://golang.org/pkg/net/#ParseCIDR | Vendor Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4CHKSFMHZVOBCZSSVRE3UEYNKARTBMTM/ | |
| https://security.gentoo.org/glsa/202208-02 | Third Party Advisory |
| https://www.oracle.com/security-alerts/cpujan2022.html | Patch Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Dockerfile
ipv4mix creates various mixed representations of a specified IPv4 address. It outputs the IP in different formats, including decimal, hexadecimal, octal, and their combinations, providing a versatile view of the address.
Dockerfile Go
None
Dockerfile
None
Dockerfile
Container image with malware and crypto miner for testing purposes
container crypto cryptominer dockerfile eicar image malware test xmrig
Dockerfile
Detect if your kubernetes cluster is using "funny" IPv4 addresses
Dockerfile Makefile Go
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-29923 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-29923 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4CHKSFMHZVOBCZSSVRE3UEYNKARTBMTM/ [No types assigned] Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/4CHKSFMHZVOBCZSSVRE3UEYNKARTBMTM/ -
Modified Analysis by [email protected]
Sep. 14, 2022
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202208-02 No Types Assigned https://security.gentoo.org/glsa/202208-02 Third Party Advisory -
CVE Modified by [email protected]
Aug. 04, 2022
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202208-02 [No Types Assigned] -
Modified Analysis by [email protected]
Apr. 22, 2022
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/4CHKSFMHZVOBCZSSVRE3UEYNKARTBMTM/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/4CHKSFMHZVOBCZSSVRE3UEYNKARTBMTM/ Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Mar. 26, 2022
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/4CHKSFMHZVOBCZSSVRE3UEYNKARTBMTM/ [No Types Assigned] -
Modified Analysis by [email protected]
Mar. 01, 2022
Action Type Old Value New Value Changed Reference Type https://www.oracle.com/security-alerts/cpujan2022.html No Types Assigned https://www.oracle.com/security-alerts/cpujan2022.html Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:oracle:timesten_in-memory_database:*:*:*:*:*:*:*:* versions up to (excluding) 21.1.1.1.0 -
CVE Modified by [email protected]
Feb. 07, 2022
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpujan2022.html [No Types Assigned] -
Initial Analysis by [email protected]
Aug. 17, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Changed Reference Type https://defcon.org/html/defcon-29/dc-29-speakers.html#kaoudis No Types Assigned https://defcon.org/html/defcon-29/dc-29-speakers.html#kaoudis Third Party Advisory Changed Reference Type https://github.com/golang/go/issues/30999 No Types Assigned https://github.com/golang/go/issues/30999 Exploit, Issue Tracking, Third Party Advisory Changed Reference Type https://github.com/golang/go/issues/43389 No Types Assigned https://github.com/golang/go/issues/43389 Issue Tracking, Third Party Advisory Changed Reference Type https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-016.md No Types Assigned https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-016.md Exploit, Third Party Advisory Changed Reference Type https://golang.org/pkg/net/#ParseCIDR No Types Assigned https://golang.org/pkg/net/#ParseCIDR Vendor Advisory Changed Reference Type https://go-review.googlesource.com/c/go/+/325829/ No Types Assigned https://go-review.googlesource.com/c/go/+/325829/ Patch, Third Party Advisory Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* versions up to (excluding) 1.17
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-29923 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-29923
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.23 }} 0.02%
score
0.60528
percentile