Buffer overflow in Isync_project Isync
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…
Vulnerability class: Buffer Overflow
EPSS: 0.035 (87.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Isync_project Isync
- Debian Debian_linux — versions 9.0
- Fedoraproject Fedora — versions 35
- Redhat Enterprise_linux — versions 7.0
- N/a Isync — versions isync 1.4.4
Weakness classification (CWE)
References
- patrick@puiterwijk.org (Third Party Advisory, x_refsource_MISC, Issue Tracking)
- patrick@puiterwijk.org (Mailing List, Third Party Advisory, x_refsource_MISC)
- patrick@puiterwijk.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- patrick@puiterwijk.org (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
Frequently asked questions
- What is CVE-2021-3657?
- CVE-2021-3657 is a critical-severity vulnerability in Isync_project Isync, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2022-02-18.
- How severe is CVE-2021-3657?
- Critical severity. CVSS v3 base score is 9.8 out of 10.