CVE-2017-17484

critical

Published 2017-12-10 · Modified 2026-05-13

CVSS v3

9.8

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2

7.5

VIR risk

9.8

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.

Predictions

Exploit likelihood

97%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2017-17484

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2017-17484.html

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — https://ssl.icu-project.org/trac/ticket/13510

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — https://ssl.icu-project.org/trac/ticket/13490

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — https://ssl.icu-project.org/trac/changeset/40715

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — https://ssl.icu-project.org/trac/changeset/40714

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — https://ssl.icu-project.org/trac/attachment/ticket/13490/poc.cpp

OS impact

OS	Version	Status	Fixed in
sles		affected
debian	bookworm	fixed	`0`
debian	bullseye	fixed	`0`
debian	forky	fixed	`0`
debian	sid	fixed	`0`
debian	trixie	fixed	`0`

Application impact

Vendor	Product	Versions	Fixed
icu-project	international_components_for_unicode	`{"endIncluding":"60.1"}`

References

CWEs

CWE-119

Verify integrity in audit chain (admin only). AS-IS.