CVE-2021-20247

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Summary

CVECVE-2021-20247
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-02-23 19:15:00 UTC
Updated2023-11-07 03:29:00 UTC
DescriptionA 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.

Risk And Classification

Problem Types: CWE-22

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 9.0 All All All
Application Fedoraproject Extra Packages For Enterprise Linux 8.0 All All All
Application Fedoraproject Extra Packages For Enterprise Linux 8.0 All All All
Operating System Fedoraproject Fedora 32 All All All
Operating System Fedoraproject Fedora 33 All All All
Operating System Fedoraproject Fedora 32 All All All
Operating System Fedoraproject Fedora 33 All All All
Application Mbsync Project Mbsync All All All All
Application Mbsync Project Mbsync All All All All

References

ReferenceSourceLinkTags
1928963 – (CVE-2021-20247) CVE-2021-20247 isync/mbsync: mailbox names returned by IMAP LIST/LSUB not validated MISC bugzilla.redhat.com Issue Tracking, Third Party Advisory
[SECURITY] Fedora 32 Update: isync-1.4.1-1.fc32 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
isync: Multiple Vulnerabilities (GLSA 202208-15) — Gentoo security GENTOO security.gentoo.org
oss-security - CVE-2021-20247: isync/mbsync data leak/destruction vulnerability MISC www.openwall.com Exploit, Mailing List, Third Party Advisory
[SECURITY] Fedora 32 Update: isync-1.4.1-1.fc32 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org Mailing List, Third Party Advisory
[SECURITY] Fedora 33 Update: isync-1.4.1-1.fc33 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org Mailing List, Third Party Advisory
[SECURITY] [DLA 3066-1] isync security update MLIST lists.debian.org
[SECURITY] Fedora 33 Update: isync-1.4.1-1.fc33 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 179393 Debian Security Update for isync (CVE-2021-20247)
  • 180384 Debian Security Update for isync (DLA 3066-1)
  • 281601 Fedora Security Update for isync (FEDORA-2021-954ebabcf7)
  • 281602 Fedora Security Update for isync (FEDORA-2021-ef8c2acfce)
  • 501585 Alpine Linux Security Update for isync
  • 501869 Alpine Linux Security Update for isync
  • 710592 Gentoo Linux isync Multiple Vulnerabilities (GLSA 202208-15)
  • 750281 OpenSUSE Security Update for isync (openSUSE-SU-2021:0516-1)
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