CVE-2021-44143
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.66%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.66% probability · 89th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- isync project/isync · debian/debian linux · fedoraproject/fedora
- Source
- cve@mitre.org
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.fedoraproject.org/message/CYZ2GNB4ZO2T27D2XNUWMCS3THZYSJQU/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LCBSY7OZ57XNC6ZYXF6WU5KBSWITZVDX/
- https://security.gentoo.org/glsa/202208-15Third Party Advisory
- https://sourceforge.net/p/isync/isync/commit_browserPatch, Third 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.fedoraproject.org/message/CYZ2GNB4ZO2T27D2XNUWMCS3THZYSJQU/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LCBSY7OZ57XNC6ZYXF6WU5KBSWITZVDX/
- https://security.gentoo.org/glsa/202208-15Third Party Advisory
- https://sourceforge.net/p/isync/isync/commit_browserPatch, Third Party Advisory
- https://sourceforge.net/p/isync/isync/ref/master/tags/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.