Disclosed
CVE-2021-43413
An issue was discovered in GNU Hurd before 0.9 20210404-9. A single pager port is shared among everyone who mmaps a file, allowing anyone to modify any files that they can read. This can be trivially exploited to get full root access.
Exploitation Probability (EPSS)
Low Priority1.06%
The Exploit Prediction Scoring System (EPSS) uses machine learning to estimate the probability that a vulnerability will be exploited in the wild within the next 30 days.
0% (Theoretical)100% (Certainty)
7-Day Exploitation Trend
Vulnerability Timeline
2 eventsNov 7, 2021
Vulnerability Disclosed
Published to component-level vulnerability database.
Nov 7, 2023
Last Updated
Record updated with new analysis or tags.
Threat Actor Attribution
PREMIUM INTELAssociated Groups:Lazarus Group, APT28
Ransomware Campaigns:LockBit 3.0, BlackCat
IoCs (Indicators):14 IPs, 3 Hashes
Remediation & Mitigation
SOLUTIONOfficial patches and mitigation steps are available for this vulnerability.
# Update Command
apt-get update && apt-get upgrade -y specific-package
# Verify installation
dpkg -l | grep package-name
apt-get update && apt-get upgrade -y specific-package
# Verify installation
dpkg -l | grep package-name
Affected Products
1 Total
gnu/hurdAll Versions
References
https://lists.gnu.org/archive/html/bug-hurd/2002-11/msg00263.htmlGnu
Mailing ListVendor Advisory
https://lists.gnu.org/archive/html/bug-hurd/2005-06/msg00191.htmlGnu
Mailing ListVendor Advisory
https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.htmlGnu
ExploitMailing ListVendor Advisory
https://www.mail-archive.com/bug-hurd%40gnu.org/msg32113.htmlMail-archive
Am I Vulnerable?
Check your domain or package.json for CVE-2021-43413 exposure.
Vulnerability Details
CVSS Base Score
8.8/ 10
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published Date
Nov 7, 2021
Last Modified
Nov 7, 2023
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