CVE-2019-17362 — In LibTomCrypt through 1
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
Published
2019-10-09T00:00:00.000Z
Last modified
2024-11-15T15:03:01.466Z
01What is this vulnerability?
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.
02Affected products
| Vendor | Product | Versions |
|---|
| n | a / n/a | n/a |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2019-10-09T00:00:00.000Z
- Last modified: 2024-11-15T15:03:01.466Z
09References
- vuldb.com — https://vuldb.com/?id.142995
- github.com — https://github.com/libtom/libtomcrypt/issues/507
- github.com — https://github.com/libtom/libtomcrypt/pull/508
- lists.debian.org — https://lists.debian.org/debian-lts-announce/2019/10/msg00010.html
- lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00020.html
- lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00041.html
- lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
- lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
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