CVE-2021-20247

2021-02-2318:45:29

CWE-20

redhat

www.cve.org

mbsync vulnerability

data confidentiality

data integrity

imap issue

synchronization channel vulnerability

AI Score

7.5

Confidence

High

EPSS

0.006

Percentile

78.2%

JSON

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.

CNA Affected

[
  {
    "product": "isync/mbsync",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "before 1.35"
      },
      {
        "status": "affected",
        "version": "before 1.4.1"
      }
    ]
  }
]