CVE-2021-33833: Buffer Overflow
First published: Wed Jun 09 2021(Updated: )
ConnMan (aka Connection Manager) 1.30 through 1.39 has a stack-based buffer overflow in uncompress in dnsproxy.c via NAME, RDATA, or RDLENGTH (for A or AAAA).
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Intel Connection Manager | >=1.30<=1.39 | |
| Debian Debian Linux | =9.0 | |
| debian/connman | 1.36-2.1~deb10u2 1.36-2.1~deb10u5 1.36-2.2+deb11u2 1.41-3 1.42-5 | |
| ubuntu/connman | <1.35-6ubuntu0.1~ | 1.35-6ubuntu0.1~ |
| ubuntu/connman | <1.36-2ubuntu0.1 | 1.36-2ubuntu0.1 |
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Reference Links
- https://lore.kernel.org/connman/
- http://www.openwall.com/lists/oss-security/2021/06/09/1
- https://security.gentoo.org/glsa/202107-29
- http://www.openwall.com/lists/oss-security/2022/01/25/1
- https://lists.debian.org/debian-lts-announce/2022/02/msg00009.html
- https://launchpad.net/bugs/cve/CVE-2021-33833
- https://www.openwall.com/lists/oss-security/2021/06/09/1
- https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=eceb2e8d2341c041df55a5e2f047d9a8c491463c
- https://security-tracker.debian.org/tracker/CVE-2021-33833
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33833
- https://seclists.org/oss-sec/2021/q2/196
- https://ubuntu.com/security/notices/USN-6236-1
- https://nvd.nist.gov/vuln/detail/CVE-2021-33833
- https://ubuntu.com/security/CVE-2021-33833
Frequently Asked Questions
What is the vulnerability CVE-2021-33833?
CVE-2021-33833 is a stack-based buffer overflow in ConnMan (Connection Manager) 1.30 through 1.39, specifically in the uncompress function in dnsproxy.c via NAME, RDATA, or RDLENGTH.
How severe is CVE-2021-33833?
CVE-2021-33833 has a severity rating of 9.8, which is considered critical.
Which software versions are affected by CVE-2021-33833?
ConnMan versions 1.30 through 1.39 are affected by CVE-2021-33833.
How can I fix CVE-2021-33833?
To fix CVE-2021-33833, update to ConnMan version 1.35-6ubuntu0.1~ for Ubuntu Bionic, 1.36-2ubuntu0.1 for Ubuntu Focal, or apply the appropriate remedy provided by Debian if running a Debian-based system.
Where can I find more information about CVE-2021-33833?
You can find more information about CVE-2021-33833 at the following references: [https://lore.kernel.org/connman/](https://lore.kernel.org/connman/), [http://www.openwall.com/lists/oss-security/2021/06/09/1](http://www.openwall.com/lists/oss-security/2021/06/09/1), [https://security.gentoo.org/glsa/202107-29](https://security.gentoo.org/glsa/202107-29).
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- collector/usn-cve
- source/Ubuntu
- agent/software-canonical-lookup
- collector/security-tracker-debian
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- source/NVD
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- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/tags
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- vendor/intel
- canonical/intel connection manager
- version/intel connection manager/1.30
- version/intel connection manager/1.39
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- package-manager/ubuntu
- package-manager/debian