CVE-2021-44143
First published: Tue Nov 16 2021(Updated: )
A flaw was found in mbsync in isync 1.4.0 through 1.4.3. Due to an unchecked condition, a malicious or compromised IMAP server could use a crafted mail message that lacks headers (i.e., one that starts with an empty line) to provoke a heap overflow, which could conceivably be exploited for remote code execution.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/isync | 1.3.0-2.2+deb11u1 1.4.4-5 | |
| isync | >=1.4.0<=1.4.3 | |
| Debian | =9.0 | |
| Debian | =10.0 | |
| Debian | =11.0 | |
| Fedora | =34 | |
| Fedora | =35 |
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Reference Links
- https://security-tracker.debian.org/tracker/CVE-2021-3657
- https://security-tracker.debian.org/tracker/CVE-2021-44143
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=999804
- https://www.openwall.com/lists/oss-security/2021/12/03/2
- http://www.openwall.com/lists/oss-security/2021/12/03/2
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CYZ2GNB4ZO2T27D2XNUWMCS3THZYSJQU/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LCBSY7OZ57XNC6ZYXF6WU5KBSWITZVDX/
- https://security.gentoo.org/glsa/202208-15
- https://sourceforge.net/p/isync/isync/commit_browser
- https://sourceforge.net/p/isync/isync/ref/master/tags/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CYZ2GNB4ZO2T27D2XNUWMCS3THZYSJQU/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LCBSY7OZ57XNC6ZYXF6WU5KBSWITZVDX/
Frequently Asked Questions
What is the severity of CVE-2021-44143?
CVE-2021-44143 has been classified with high severity due to the potential for a heap overflow vulnerability.
How do I fix CVE-2021-44143?
To fix CVE-2021-44143, upgrade isync to version 1.4.4-5 or later.
Which versions of isync are affected by CVE-2021-44143?
CVE-2021-44143 affects isync versions from 1.4.0 to 1.4.3.
What are the potential impacts of CVE-2021-44143?
Exploitation of CVE-2021-44143 could lead to remote code execution through a crafted mail message.
Can I use Debian or Fedora systems with isync affected by CVE-2021-44143?
Yes, Debian systems running versions 9.0, 10.0, 11.0 and Fedora versions 34, 35 are affected by CVE-2021-44143.
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