Headline
Gentoo Linux Security Advisory 202208-15
Gentoo Linux Security Advisory 202208-15 - Multiple vulnerabilities have been discovered in isync, the worst of which could result in arbitrary code execution. Versions less than 1.4.4 are affected.
Gentoo Linux Security Advisory GLSA 202208-15
https://security.gentoo.org/
Severity: Normal
Title: isync: Multiple Vulnerabilities
Date: August 10, 2022
Bugs: #771738, #794772, #826902
ID: 202208-15
Synopsis
Multiple vulnerabilities have been discovered in isync, the worst of
which could result in arbitrary code execution.
Background
isync is an IMAP and MailDir mailbox synchronizer.
Affected packages
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Package / Vulnerable / Unaffected
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1 net-mail/isync < 1.4.4 >= 1.4.4
Description
Multiple vulnerabilities have been discovered in isync. Please review
the CVE identifiers referenced below for details.
Impact
Please review the referenced CVE identifiers for details.
Workaround
There is no known workaround at this time.
Resolution
All isync users should upgrade to the latest version:
emerge --sync
emerge --ask --oneshot --verbose “>=net-mail/isync-1.4.4”
References
[ 1 ] CVE-2021-3578
https://nvd.nist.gov/vuln/detail/CVE-2021-3578
[ 2 ] CVE-2021-3657
https://nvd.nist.gov/vuln/detail/CVE-2021-3657
[ 3 ] CVE-2021-20247
https://nvd.nist.gov/vuln/detail/CVE-2021-20247
[ 4 ] CVE-2021-44143
https://nvd.nist.gov/vuln/detail/CVE-2021-44143
Availability
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202208-15
Concerns?
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users’ machines is of utmost
importance to us. Any security concerns should be addressed to
[email protected] or alternatively, you may file a bug at
https://bugs.gentoo.org.
License
Copyright 2022 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
https://creativecommons.org/licenses/by-sa/2.5
Related news
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.
A flaw was found in mbsync before v1.3.6 and v1.4.2, where an unchecked pointer cast allows a malicious or compromised server to write an arbitrary integer value past the end of a heap-allocated structure by issuing an unexpected APPENDUID response. This could be plausibly exploited for remote code execution on the client.
A flaw was found in mbsync in isync 1.4.0 through 1.4.3. Due to an unchecked condition, a malicious or compromised IMAP server could use a crafted mail message that lacks headers (i.e., one that starts with an empty line) to provoke a heap overflow, which could conceivably be exploited for remote code execution.
A flaw was found in mbsync before v1.3.5 and v1.4.1. Validations of the mailbox names returned by IMAP LIST/LSUB do not occur allowing a malicious or compromised server to use specially crafted mailbox names containing '..' path components to access data outside the designated mailbox on the opposite end of the synchronization channel. The highest threat from this vulnerability is to data confidentiality and integrity.