CVE-2021-3657

EUVD-2021-26952
A flaw was found in mbsync versions prior to 1.4.4. Due to inadequate handling of extremely large (>=2GiB) IMAP literals, malicious or compromised IMAP servers, and hypothetically even external email senders, could cause several different buffer overflows, which could conceivably be exploited for remote code execution.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 91%
Affected Products (NVD)
VendorProductVersion
isync_projectisync
𝑥
< 1.4.4
redhatenterprise_linux
7.0
debiandebian_linux
9.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
isync
bookworm
1.4.4-5
fixed
bullseye
1.3.0-2.2+deb11u1
fixed
sid
1.4.4-5
fixed
trixie
1.4.4-5
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
isync
bionic
needed
focal
needed
hirsute
ignored
impish
ignored
jammy
needed
kinetic
ignored
lunar
ignored
mantic
ignored
noble
needed
trusty
ignored
xenial
needs-triage