CVE-2019-17362

Exp

In LibTomCrypt through 1.18.2, the der_decode_utf8_string function (in der_decode_utf8_string.c) does not properly detect certain invalid UTF-8 sequences. This allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) or read information from other memory locations via carefully crafted DER-encoded data.

Published: 2019-10-08 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-17362 is rated High Exploit Risk (84.4/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 3.19%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.72% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2019-17362

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2019-17362

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.47% 3.19% +2.72%
2 2025-11-21 1.85% 0.47% -1.37%
3 2025-11-18 — 1.85% —

Full EPSS history (18 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-17362

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.2 [email protected]
6.4 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 4.9 [email protected]

Weakness enumeration for CVE-2019-17362

OS Trackers for CVE-2019-17362

vendor priority summary link
alpine — CVE-2019-17362: 1 source package rows (perl-cryptx); 6 state rows across 6 repos (3.18-community, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 6, open 0. https://security.alpinelinux.org/vuln/CVE-2019-17362
debian not yet assigned CVE-2019-17362 not yet assigned priority: Debian including 1 source packages (libtomcrypt), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-17362
redhat medium — https://access.redhat.com/security/cve/CVE-2019-17362
suse medium CVE-2019-17362 severity moderate: SUSE including 9 source package names (libtomcrypt-devel-1.17-3.3.1, libtomcrypt-devel-1.17-lp150.2.3.1, …), 36 product×package rows across 14 product lines (SUSE Linux Enterprise Desktop 12 SP4, SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP2, … (14 product lines)): Fixed 36. https://www.suse.com/security/cve/CVE-2019-17362/
ubuntu medium CVE-2019-17362 medium priority: Ubuntu including 1 source packages (libtomcrypt), 13 status rows across 13 suites (bionic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, trusty, upstream, xenial): not-affected 7, released 4, ignored 2. https://ubuntu.com/security/CVE-2019-17362

Affected software / configurations for CVE-2019-17362

Vendor Product Version Raw CPE
libtom libtomcrypt <= 1.18.2 cpe:2.3:a:libtom:libtomcrypt:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

References for CVE-2019-17362

URL Tags
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00020.html
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00041.html
https://github.com/libtom/libtomcrypt/issues/507 Exploit Third Party Advisory
https://github.com/libtom/libtomcrypt/pull/508 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/10/msg00010.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/47YP5SXQ4RY6KMTK2HI5ZZR244XKRMCZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YU5OMCY3PX54YVI4FMNDEENHDJZJ3RJW/
https://vuldb.com/?id.142995 Permissions Required
https://lists.fedoraproject.org/archives/list/[email protected]/message/47YP5SXQ4RY6KMTK2HI5ZZR244XKRMCZ/
https://lists.fedoraproject.org/archives/list/[email protected]/message/YU5OMCY3PX54YVI4FMNDEENHDJZJ3RJW/
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