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Public proof of conceptFix available

CVE-2019-17362

A public proof of concept exists; no exploitation attested.

  • Published2019-10-09
  • WeaknessCWE-125

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2019-10-0901:15CVE publishedNVD

Versions per branch

NVD
Debian debian linux
BranchAffectedFixed in
8.0= 8.0no fix published
Libtom libtomcrypt
BranchAffectedFixed in
1.18≤ 1.18.2no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libtomcryptUbuntu:Pro:18.04:LTSall versions · fixed in 1.18.1-1ubuntu0.1+esm1
  • libtomcryptUbuntu:Pro:16.04:LTSall versions · fixed in 1.17-7ubuntu0.1+esm1
  • libtomcryptUbuntu:Pro:14.04:LTSall versions · fixed in 1.17-5ubuntu0.1+esm1
  • libtomcryptSUSE:Linux Enterprise Workstation Extension 12 SP5all versions · fixed in 1.17-3.3.1
  • libtomcryptSUSE:Linux Enterprise Workstation Extension 12 SP4all versions · fixed in 1.17-3.3.1
  • libtomcryptSUSE:Linux Enterprise Desktop 12 SP4all versions · fixed in 1.17-3.3.1
  • libtomcryptopenSUSE:Leap 15.1all versions · fixed in 1.17-lp151.3.3.1
  • libtomcryptopenSUSE:Leap 15.0all versions · fixed in 1.17-lp150.2.3.1

17 more package ranges on OSV.dev

Vendor advisories

  • CVE-2019-17362 Red Hat Product Security

    libtomcrypt: out-of-bounds read in the der_decode_utf8_string function in der_decode_utf8_string.c

Full record on NVD

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Published
2019-10-09
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-x32c-6j92-4hp9

Frequently asked questions

What is CVE-2019-17362?

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.

Is CVE-2019-17362 actively exploited?

A proof-of-concept exploit exists for CVE-2019-17362, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2019-17362?

CVE-2019-17362 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

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