CVE-2021-43413

HighCVSS 8.8/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://lists.gnu.org/archive/html/bug-hurd/2002-11/msg00263.htmlMailing List, Vendor Advisory
https://lists.gnu.org/archive/html/bug-hurd/2005-06/msg00191.htmlMailing List, Vendor Advisory
https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.htmlExploit, Mailing List, Vendor Advisory
https://www.mail-archive.com/bug-hurd%40gnu.org/msg32113.html
https://lists.gnu.org/archive/html/bug-hurd/2002-11/msg00263.htmlMailing List, Vendor Advisory
https://lists.gnu.org/archive/html/bug-hurd/2005-06/msg00191.htmlMailing List, Vendor Advisory
https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.htmlExploit, Mailing List, Vendor Advisory
https://www.mail-archive.com/bug-hurd%40gnu.org/msg32113.html

Timeline

Published: Nov 7, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-434147.0An issue was discovered in GNU Hurd before 0.9 20210404-9. The use of an authentication protocol in the proc server is vulnerable to man-in-CVE-2021-434158.8HashiCorp Nomad and Nomad Enterprise up to 1.0.13, 1.1.7, and 1.2.0, with the QEMU task driver enabled, allowed authenticated users with job CVE-2021-434197.5An Information Disclosure vulnerability exists in Opay Mobile application 1.5.1.26 and maybe be higher in the logcat app.CVE-2021-434209.8SQL injection vulnerability in Login.php in Sourcecodester Online Payment Hub v1 by oretnom23, allows attackers to execute arbitrary SQL com CVE-2021-434219.8A File Upload vulnerability exists in Studio-42 elFinder 2.0.4 to 2.1.59 via connector.minimal.php, which allows a remote malicious user to CVE-2021-434297.5A Denial of Service vulnerability exists in CORTX-S3 Server as of 11/7/2021 via the mempool_destroy method due to a failture to release lock CVE-2021-43439.8The Unauthenticated Account Creation plugin for WordPress is vulnerable to Unauthenticated Account Creation in versions up to, and including CVE-2021-434308.8An Access Control vulnerability exists in BigAntSoft BigAnt office messenger 5.6 via im_webserver, which could let a malicious user upload P CVE-2021-434326.1A Cross Site Scripting (XSS) vulnerability exists in Exrick XMall Admin Panel as of 11/7/2021 via the GET parameter in product-add.jsp.CVE-2021-434365.4MartDevelopers Inc iResturant v1.0 allows Stored XSS by placing a payload in the username field during a login attempt. When an administrato CVE-2021-434378.8In sourcecodetester Engineers Online Portal as of 10-21-21, an attacker can manipulate the Host header as seen by the web application and ca CVE-2021-434385.4Stored XSS in Signup Form in iResturant 1.0 Allows Remote Attacker to Inject Arbitrary code via NAME and ADDRESS field