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CVE-2016-3415: Synacor Zimbra Collaboration Suite: Insecure deserialization

CVE-2016-3415 is rated critical with a CVSS v3.0 base score of 9.1 and NVD lists Synacor Zimbra Collaboration Suite as the affected product. Per its scoring, it can be exploited over the network, without authentication, without any user interaction.

Vulnerability description

Zimbra Collaboration before 8.7.0 allows remote attackers to conduct deserialization attacks via unspecified vectors, aka bug 102276.

Severity breakdown

CVSS v3.0 9.1: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

• Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
• Attack complexity: Low. No special conditions; the attack can be repeated reliably.
• Privileges required: None. No account or prior access is needed.
• User interaction: None. No action from any user is needed.
• Scope: Unchanged. Impact stays within the vulnerable component.
• Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
• Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
• Availability impact: None. No effect on availability.

Underlying weakness

CWE-502: Deserialization of Untrusted Data

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected products

• Synacor Zimbra Collaboration Suite: up to and including 8.6.0

References

• https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
• https://wiki.zimbra.com/wiki/Zimbra_Releases/8.7.0
• http://www.securityfocus.com/bid/95917