Inadequate Encryption Strength in Fetchmail - CVE-2021-39272
Published: October 21, 2021
Vulnerability identifier: #VU57578
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-39272
CWE-ID: CWE-326
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: fetchmail.berlios.de
Affected software:
Fetchmail
Fetchmail
Detailed vulnerability description
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to Fetchmail before 6.4.22 fails to enforce STARTTLS session encryption in
some circumstances, such as a certain situation with IMAP and PREAUTH. A remote attacker with ability to intercept network traffic can gain access to sensitive information.
How to mitigate CVE-2021-39272
Install updates from vendor's website.
Sources
- https://nostarttls.secvuln.info/
- http://www.openwall.com/lists/oss-security/2021/08/27/3
- https://www.fetchmail.info/security.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L3XJ6XLEJCEZCAM5LGGD6XBCC522QLG4/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZYCYLL73NP7ALJWSDICIVSA47ZIXWSSA/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VXMKSEHAQSEDCWZMAOJEGX3P3JW6QY6H/