Becky! Internet Mail buffer overflow vulnerability


Becky! Internet Mail contains a buffer overflow vulnerability.

Becky! Internet Mail is an email client software. Becky! Internet Mail contains a buffer overflow vulnerability as it does not properly handle read receipt requests.

Yuji Ukai of Fourteenforty Research Institute, Inc. reported this vulnerability to IPA.
JPCERT/CC coordinated with the vendor under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V2 Severity:
Base Metrics 6.8 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: Partial
Affected Products

  • Becky! Internet Mail Ver.2.48.02 and eariler


If the user views a specially crafted email and allows a read receipt to be sent, arbitrary code may be executed.

[Update the Software]
Apply the latest updates provided by the vendor.

As a workaround to this vulnerability, in "General Setup", modify the setting for "How to respond to a request for 'read receipt'" to "ignore" until an update is completed.
Vendor Information

CWE (What is CWE?)

  1. Buffer Errors(CWE-119) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2009-0569

  1. JVN : JVN#29641290
  2. National Vulnerability Database (NVD) : CVE-2009-0569
  3. IPA SECURITY ALERTS : Security Alert for Becky! Internet Mail Vulnerability
  4. Secunia Advisory : SA33892
  5. SecurityFocus : 33756
  6. ISS X-Force Database : 48684
  7. JVN iPedia (Japanese) : JVNDB-2009-000011
Revision History

  • [2009/02/12]
      Web page published