Rule Category

FILE-IDENTIFY -- Snort has detecte File Type indicators associated with packet data, which it will use to facilitate a flowbit, a method of stringing rules together. In a flowbit, one rule examines packets for file type indications, which it uses to switch rules pertaining to that file type from a dormant to active state in order to process the appropriate packets. File-type rules stay dormant to prevent alerts on innocent traffic. That same traffic, when contained in, for instance, a .doc file attached to an email, might be a threat and should be scanned.

Alert Message

FILE-IDENTIFY Adobe .pfb file download request

Rule Explanation

Integer overflow in FreeType2 before 2.3.6 allows context-dependent attackers to execute arbitrary code via a crafted set of 16-bit length values within the Private dictionary table in a Printer Font Binary (PFB) file, which triggers a heap-based buffer overflow. Impact: CVSS base score 7.5 CVSS impact score 6.4 CVSS exploitability score 10.0 confidentialityImpact PARTIAL integrityImpact PARTIAL availabilityImpact PARTIAL Details: Ease of Attack:

What To Look For

Known Usage

No public information

False Positives

No known false positives

Contributors

Talos research team. This document was generated from data supplied by the national vulnerability database, a product of the national institute of standards and technology. For more information see [nvd].

MITRE ATT&CK Framework

Tactic:

Technique:

For reference, see the MITRE ATT&CK vulnerability types here: https://attack.mitre.org

CVE

Additional Links

Rule Vulnerability

CVE Additional Information

CVE-2008-1806
Integer overflow in FreeType2 before 2.3.6 allows context-dependent attackers to execute arbitrary code via a crafted set of 16-bit length values within the Private dictionary table in a Printer Font Binary (PFB) file, which triggers a heap-based buffer overflow.
Details
SeverityHIGH Base Score7.5
Impact Score6.4 Exploit Score10.0
Confidentiality ImpactPARTIAL Integrity ImpactPARTIAL
Availability ImpactPARTIAL Access Vector
AuthenticationNONE Ease of Access
CVE-2008-1807
FreeType2 before 2.3.6 allow context-dependent attackers to execute arbitrary code via an invalid "number of axes" field in a Printer Font Binary (PFB) file, which triggers a free of arbitrary memory locations, leading to memory corruption.
Details
SeverityHIGH Base Score7.5
Impact Score6.4 Exploit Score10.0
Confidentiality ImpactPARTIAL Integrity ImpactPARTIAL
Availability ImpactPARTIAL Access Vector
AuthenticationNONE Ease of Access