Buffer overflow in Icu-Project International Components For Unicode
CVE-2017-17484
The ucnv_UTF8FromUTF8 function in ucnv_u8.cpp in International Components for Unicode (ICU) for C/C++ through 60.1 mishandles ucnv_convertEx calls for UTF-8 to UTF-8 conversion, which allows remote attackers to cause a denial of service (stack-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted string, as demonstrated by ZNC.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.046 (91.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.046 · newest: 0.046 · change: 0.000
Affected products
Weakness classification (CWE)
References
- ssl.icu-project.org/trac/ticket/13490 (Issue Tracking, Vendor Advisory)
- ssl.icu-project.org/trac/changeset/40714 (Patch, Issue Tracking, Vendor Advisory)
- github.com/znc/znc/issues/1459 (Third Party Advisory, Issue Tracking)
- ssl.icu-project.org/trac/attachment/ticket/13490/poc.cpp (Exploit, Vendor Advisory)
- ssl.icu-project.org/trac/ticket/13510 (Issue Tracking, Vendor Advisory)
- ssl.icu-project.org/trac/changeset/40715 (Issue Tracking, Vendor Advisory)
- www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
Frequently asked questions
- What is CVE-2017-17484?
- CVE-2017-17484 is a critical-severity vulnerability in Icu-Project International Components For Unicode, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2017-12-10.
- How severe is CVE-2017-17484?
- Critical severity. CVSS v3 base score is 9.8 out of 10.