CVE-2017-8911
CVE-2017-8911 is a critical-severity vulnerability in Tnef Project Tnef with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-191.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 2% (78th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-191
- Affected product: Tnef Project Tnef
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2017-8911?
- 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.
- How severe is CVE-2017-8911?
- CVE-2017-8911 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2017-8911 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2017-8911?
- CVE-2017-8911 affects Tnef Project Tnef. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2017-8911?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2017-8911 published?
- CVE-2017-8911 was published on 2017-05-12 and last updated on 2026-06-17.
References
- http://www.debian.org/security/2017/dsa-3869
- https://github.com/verdammelt/tnef/issues/23
- https://security.gentoo.org/glsa/201708-02
Affected products (1)
- cpe:2.3:a:tnef_project:tnef:1.4.14:*:*:*:*:*:*:*
More vulnerabilities in Tnef Project Tnef
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- CVE-2017-6309 — High (CVSS 7.8): An issue was discovered in tnef before 1.4.13. Two type confusions have been identified in the parse_file() function.…
- CVE-2017-6308 — High (CVSS 7.8): An issue was discovered in tnef before 1.4.13. Several Integer Overflows, which can lead to Heap Overflows, have been…
- CVE-2017-6307 — High (CVSS 7.8): An issue was discovered in tnef before 1.4.13. Two OOB Writes have been identified in src/mapi_attr.c:mapi_attr_read().…
- CVE-2019-18849 — Medium (CVSS 5.5): 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…
All CVEs affecting Tnef Project Tnef →
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