Tnef
CVE-2017-8911
CRITICAL
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Integer underflow checks
|
| Impact | CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 0.22%. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system. |
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Alert meAnalysisAI
An integer underflow has been identified in the unicode_to_utf8() function in tnef 1.4.14. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
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Technical ContextAI · show details
This vulnerability is classified under CWE-191. An integer underflow has been identified in the unicode_to_utf8() function in tnef 1.4.14. This might lead to invalid write operations, controlled by an attacker. Affected products include: Tnef Project Tnef.
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
An integer underflow has been identified in the unicode_to_utf8() function in tnef 1.4.14. This might lead to invalid write operations, controlled by an attacker.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Integer overflow occurs when an arithmetic operation produces a result that exceeds the maximum value a given integer type can store.
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
Affected Products (CPE)CVE.org
In tnef before 1.4.18, an attacker may be able to write to the victim's .ssh/authorized_keys file via an e-mail message
Processing a crafted TNEF file with uncompressed RTF data through tnef can trigger an out-of-bounds read in get_rtf_data
An issue was discovered in tnef before 1.4.13. Rated high severity (CVSS 7.8), this vulnerability is no authentication r
An issue was discovered in tnef before 1.4.13. Rated high severity (CVSS 7.8), this vulnerability is no authentication r
An issue was discovered in tnef before 1.4.13. Rated high severity (CVSS 7.8), this vulnerability is no authentication r
An issue was discovered in tnef before 1.4.13. Rated high severity (CVSS 7.8), this vulnerability is no authentication r
Extracting a specially crafted Transport Neutral Encapsulation Format (TNEF, "winmail.dat") file that contains multiple
Heap-based buffer overflow in the tnef command-line TNEF (winmail.dat) extractor allows a crafted TNEF file with a large
Exploit-DB