Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2021-3657

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.

Published

2022-02-18T18:15:09.603

Last Modified

2024-11-21T06:22:05.373

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Secondary
CWE-119
Type: Primary
CWE-119

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	isync_project	isync	< 1.4.4	Yes
Operating System	fedoraproject	fedora	35	Yes
Operating System	redhat	enterprise_linux	7.0	Yes
Operating System	debian	debian_linux	9.0	Yes

References

https://bugzilla.redhat.com/show_bug.cgi?id=2028932 Issue Tracking, Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2022/07/msg00001.html Mailing List, Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/202208-15 Third Party Advisory ([email protected])
https://www.openwall.com/lists/oss-security/2021/12/03/1 Mailing List, Third Party Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=2028932 Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2022/07/msg00001.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202208-15 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.openwall.com/lists/oss-security/2021/12/03/1 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)