7.5

CVE-2021-29923: fedoraproject fedora

Modified
AliasesRHSA-2021:3585RHSA-2021:4910RHSA-2022:0989
Published 07-08-2021Last modified 03-08-2024

Vulnerability summary

CVE-2021-29923 is a high (CVSS 7.5) vulnerability in fedoraproject fedora. EPSS estimates a 3.74% chance of exploitation in the next 30 days, higher than 89.8% of scored vulnerabilities. 2 public exploits are recorded.

Priority
Prioritisepublic exploit

Public exploit (GitHub, Date unknown)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
3.74%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits2github

Advisory lineage

Upstream 0 · Downstream 9
RHSA-2021:3431RHSA-2021:4722RHSA-2022:0237RHSA-2022:0260RHSA-2022:0432RHSA-2022:0557

Timeline

  1. 07-08-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

3.74%

Chance of exploitation in the next 30 days

Percentile

90%

Versus all other CVEs

30-day change

No change 0.00 pp

From 3.74% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

2 found
  • githubUnverified

    Go

    Maturity: poc

  • githubUnverified

    Security

    Maturity: poc

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Redhat15 products
  • delve< 0:1.5.0-2.module+el8.4.0+8864+58b0fcdb
  • delve-debuginfo< 0:1.5.0-2.module+el8.4.0+8864+58b0fcdb
  • delve-debugsource< 0:1.5.0-2.module+el8.4.0+8864+58b0fcdb
  • go-toolset< 0:1.15.14-2.module+el8.4.0+12542+e3fec473
  • golang< 0:1.15.14-2.module+el8.4.0+12542+e3fec473
Ubuntu7 products
  • golang-1.10All versions (No fix recorded)
  • golang-1.13All versions (No fix recorded)
  • golang-1.14All versions (No fix recorded)
  • golang-1.16All versions (No fix recorded)
  • golang-1.6All versions (No fix recorded)
Alpine1 product
  • go< 1.17-r0
Debian1 product
  • golang-1.15All versions (No fix recorded)
Fedoraproject1 product
Golang1 product
Oracle1 product

7 vendors · 27 products

References

28 links
Show all 28 references