Bug 2028932 (CVE-2021-3657) - CVE-2021-3657 isync: buffer overflows due to inadequate handling of extremely large IMAP literals
Summary: CVE-2021-3657 isync: buffer overflows due to inadequate handling of extremely...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-3657
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2028933 2028934
Blocks: Red Hat2027980
TreeView+ depends on / blocked
 
Reported: 2021-12-03 18:39 UTC by Guilherme de Almeida Suckevicz
Modified: 2022-02-17 11:32 UTC (History)
2 users (show)

Fixed In Version: isync 1.4.4
Doc Type: If docs needed, set a value
Doc Text:
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.
Clone Of:
Environment:
Last Closed: 2021-12-03 19:09:03 UTC

Attachments (Terms of Use)

Description Guilherme de Almeida Suckevicz 2021-12-03 18:39:15 UTC 
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.

Reference:
https://www.openwall.com/lists/oss-security/2021/12/03/1
Comment 1 Guilherme de Almeida Suckevicz 2021-12-03 18:39:32 UTC 
Created isync tracking bugs for this issue:

Affects: epel-all [bug 2028934]
Affects: fedora-all [bug 2028933]
Comment 2 Product Security DevOps Team 2021-12-03 19:09:01 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
Note You need to log in before you can comment on or make changes to this bug.