Untrusted Pointer Dereference in Isync: mailbox synchronizer - CVE-2021-3578
Published: June 13, 2021
Vulnerability identifier: #VU54076
CSH Severity: Medium
CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-3578
CWE-ID: CWE-822
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to a boundary error in mbsync when processing unexpected APPENDUID response from a malicious server. A remote attacker who controls a mail server can send a specially crafted response to the client, trigger memory corruption and execute arbitrary code on the system.
Affected software
Isync: mailbox synchronizer
Arch Linux
Fedora
isync
Arch Linux
Fedora
isync
How to mitigate CVE-2021-3578
Install updates from vendor's website.
Isync: mailbox synchronizer - addressed in versions 1.3.6, 1.4.2
isync - addressed in versions 1.4.2-1.fc33, 1.4.2-1.fc34
isync - addressed in versions 1.4.2-1.fc33, 1.4.2-1.fc34