Vulnerability Description
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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Isync Project | Isync | >= 1.4.0, <= 1.4.3 |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 34 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2021/12/03/2Mailing List
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=999804Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202208-15Third Party Advisory
- https://sourceforge.net/p/isync/isync/commit_browserPatchThird Party Advisory
- https://sourceforge.net/p/isync/isync/ref/master/tags/Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/12/03/2Mailing List
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=999804Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202208-15Third Party Advisory
- https://sourceforge.net/p/isync/isync/commit_browserPatchThird Party Advisory
- https://sourceforge.net/p/isync/isync/ref/master/tags/Third Party Advisory
FAQ
What is CVE-2021-44143?
CVE-2021-44143 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 start...
How severe is CVE-2021-44143?
CVE-2021-44143 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-44143?
Check the references section above for vendor advisories and patch information. Affected products include: Isync Project Isync, Debian Debian Linux, Fedoraproject Fedora.