sSMTP from_format() information disclosure

ssmtp-fromformat-information-disclosure (45038) The risk level is classified as LowLow Risk

Description:

sSMTP could allow a remote attacker to obtain sensitive information, caused by an error in the from_format() function that calls the strdup() with uninitialized memory. If geco is unset and FromLineOverride is disabled, a remote attacker could exploit this vulnerability to obtain sensitive information copied from the "From:" field within an email.

*CVSS:

Base Score: 5
  Access Vector: Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: None
  Availability Impact: None
 
Temporal Score: 3.7
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Obtain Information

Remedy:

Apply the patch for this vulnerability (ssmtp-unitialized-strdup.patch), available from the Gentoo-Portage Web site. See References.

References:

  • Gentoo Bugzilla Bug 234391: mail-mta/ssmtp-2.62 unitialized memory disclosure (CVE-2008-3962).
  • Gentoo-Portage Web site: mail-mta/ssmtp.
  • BID-31094: sSMTP 'from_format()' Uninitialized Memory Information Disclosure Vulnerability
  • CVE-2008-3962: The from_format function in ssmtp.c in ssmtp 2.61 and 2.62, in certain configurations, uses uninitialized memory for the From: field of an e-mail message, which might allow remote attackers to obtain sensitive information (memory contents) in opportunistic circumstances by reading a message.
  • OSVDB ID: 48036: ssmtp ssmtp.cfrom_format Function Email From Field Remote Information Disclosure

Platforms Affected:

  • Anibal Monsalve Salazar ssmtp 2.6.2

Reported:

Sep 09, 2008

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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