CVE-2021-42097: CSRF
First published: Thu Oct 21 2021(Updated: )
GNU Mailman before 2.1.35 may allow remote Privilege Escalation. A csrf_token value is not specific to a single user account. An attacker can obtain a value within the context of an unprivileged user account, and then use that value in a CSRF attack against an admin (e.g., for account takeover).
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GNU Mailman | <2.1.35 | |
| Debian Debian Linux | =10.0 | |
| debian/mailman | 1:2.1.29-1+deb10u5 1:2.1.29-1+deb10u2 | |
| ubuntu/mailman | <1:2.1.26-1ubuntu0.4 | 1:2.1.26-1ubuntu0.4 |
| ubuntu/mailman | <1:2.1.29-1ubuntu3.1 | 1:2.1.29-1ubuntu3.1 |
| ubuntu/mailman | <2.1.35 | 2.1.35 |
| ubuntu/mailman | <1:2.1.20-1ubuntu0.6+ | 1:2.1.20-1ubuntu0.6+ |
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Reference Links
- http://www.openwall.com/lists/oss-security/2021/10/21/4
- https://bugs.launchpad.net/mailman/+bug/1947640
- https://mail.python.org/archives/list/mailman-announce@python.org/thread/IKCO6JU755AP5G5TKMBJL6IEZQTTNPDQ/
- https://www.debian.org/security/2021/dsa-4991
- https://launchpad.net/bugs/cve/CVE-2021-42097
- https://bazaar.launchpad.net/~mailman-coders/mailman/2.1/revision/1873
- https://www.openwall.com/lists/oss-security/2021/10/21/4
- https://bugs.launchpad.net/mailman/+bug/1954694
- https://launchpadlibrarian.net/573872803/patch.txt
- https://security-tracker.debian.org/tracker/CVE-2021-42097
- https://mail.python.org/archives/list/mailman-announce%40python.org/thread/IKCO6JU755AP5G5TKMBJL6IEZQTTNPDQ/
- https://ubuntu.com/security/notices/USN-5121-1
- https://ubuntu.com/security/notices/USN-5121-2
- https://www.cve.org/CVERecord?id=CVE-2021-42097
- https://nvd.nist.gov/vuln/detail/CVE-2021-42097
- https://ubuntu.com/security/CVE-2021-42097
Frequently Asked Questions
What is the vulnerability ID of this security issue?
The vulnerability ID of this security issue is CVE-2021-42097.
What is the severity level of CVE-2021-42097?
CVE-2021-42097 has a severity level of high.
What is the affected software for CVE-2021-42097?
The affected software for CVE-2021-42097 is GNU Mailman versions before 2.1.35.
How can an attacker exploit CVE-2021-42097?
An attacker can exploit CVE-2021-42097 by obtaining a csrf_token value within the context of an unprivileged user account and using it in a CSRF attack against an admin.
Are there any known remedies for CVE-2021-42097?
Yes, there are known remedies for CVE-2021-42097. For Debian, it is recommended to upgrade to version 1:2.1.29-1+deb10u5 or 1:2.1.29-1+deb10u2. For Ubuntu, upgrading to version 2.1.35 or 1:2.1.29-1ubuntu3.1 is recommended.
- collector/nvd-index
- agent/type
- agent/last-modified-date
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/softwarecombine
- collector/security-tracker-debian
- source/Debian
- agent/software-canonical-lookup
- collector/nvd-cve
- source/NVD
- agent/references
- agent/severity
- agent/weakness
- agent/remedy
- agent/tags
- agent/event
- agent/description
- collector/usn-cve
- source/Ubuntu
- vendor/gnu
- canonical/gnu mailman
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/10.0
- package-manager/debian
- package-manager/ubuntu