icu: stack-based buffer overflow in ucnv_u8.cpp:ucnv_UTF8FromUTF8 can lead to denial of service
Published Dec 10, 2017
9.8
CRITICALCVSS 3.0
EPSS 4.61%
Description
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.
Affected products
No data.
- ≤ 60.1
No data.
Red Hat Enterprise Linux 5
icu
Not affected
Red Hat Enterprise Linux 6
icu
Not affected
Red Hat Enterprise Linux 7
icu
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | icu | Not affected | n/a |
| Red Hat Enterprise Linux 6 | icu | Not affected | n/a |
| Red Hat Enterprise Linux 7 | icu | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of icu as shipped with Red Hat Enterprise Linux 5, 6, and 7.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.61% (0.04605) | 91.38th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.61% (0.04605) | 90.45th | v5 (v2026.06.15) |
| Mar 28, 2026 | 4.47% (0.04473) | 89.04th | v4 (v2025.03.14) |
| Dec 28, 2025 | 2.20% (0.02204) | 83.99th | v4 (v2025.03.14) |
| Mar 30, 2025 | 0.95% (0.00949) | 74.27th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.49% (0.03494) | 79.08th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.70% (0.00702) | 70.35th | v4 (v2025.03.14) |
| Dec 22, 2024 | 3.90% (0.03902) | 91.86th | v3 (v2023.03.01) |
| Mar 7, 2023 | 3.25% (0.03249) | 89.71th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.58% (0.02580) | 55.23th | v1 |
| Jan 6, 2022 | 2.58% (0.02580) | 54.78th | v1 |
| Sep 1, 2021 | 2.58% (0.02580) | 79.07th | v1 |
| Apr 14, 2021 | 2.58% (0.02580) | 0.00th | v1 |
References (11)
- https://access.redhat.com/security/cve/CVE-2017-17484 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1524819 Issue Tracking
- https://github.com/znc/znc/issues/1459 x_refsource_MISCIssue TrackingThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-17484
- https://ssl.icu-project.org/trac/attachment/ticket/13490/poc.cpp x_refsource_MISCExploitVendor Advisory
- https://ssl.icu-project.org/trac/changeset/40714 x_refsource_MISCIssue TrackingPatchVendor Advisory
- https://ssl.icu-project.org/trac/changeset/40715 x_refsource_MISCIssue TrackingVendor Advisory
- https://ssl.icu-project.org/trac/ticket/13490 x_refsource_MISCIssue TrackingVendor Advisory
- https://ssl.icu-project.org/trac/ticket/13510 x_refsource_MISCIssue TrackingVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2017-17484
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html x_refsource_MISC
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2017-17484 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1524819 | Issue Tracking | |
| https://github.com/znc/znc/issues/1459 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-17484 | ||
| https://ssl.icu-project.org/trac/attachment/ticket/13490/poc.cpp | x_refsource_MISCExploitVendor Advisory | |
| https://ssl.icu-project.org/trac/changeset/40714 | x_refsource_MISCIssue TrackingPatchVendor Advisory | |
| https://ssl.icu-project.org/trac/changeset/40715 | x_refsource_MISCIssue TrackingVendor Advisory | |
| https://ssl.icu-project.org/trac/ticket/13490 | x_refsource_MISCIssue TrackingVendor Advisory | |
| https://ssl.icu-project.org/trac/ticket/13510 | x_refsource_MISCIssue TrackingVendor Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2017-17484 | ||
| https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html | x_refsource_MISC |
Change history (0)
No recorded changes yet.