---
cve: "CVE-2018-16890"
severity: "MEDIUM"
cvss: 5.4
epss: "5.4%"
vendor: "The Curl Project"
kev: false
exploited: false
published: "2019-02-06 20:29:00"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-16T11:58:13+02:00"
---

# CVE-2018-16890

> 5.4 MEDIUM

## Beschreibung

libcurl versions from 7.36.0 to before 7.64.0 is vulnerable to a heap buffer out-of-bounds read. The function handling incoming NTLM type-2 messages (`lib/vauth/ntlm.c:ntlm_decode_type2_target`) does not validate incoming data correctly and is subject to an integer overflow vulnerability. Using that overflow, a malicious or broken NTLM server could trick libcurl to accept a bad length + offset combination that would lead to a buffer read out-of-bounds.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Keine | good |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- f3294d9d86e6a7915a967efff2842089b8b0d071 (Commit)

## Referenzen

- <https://www.debian.org/security/2019/dsa-4386>
- <http://www.securityfocus.com/bid/106947>
- <https://curl.haxx.se/docs/CVE-2018-16890.html>
- <https://security.netapp.com/advisory/ntap-20190315-0001/>
- <https://usn.ubuntu.com/3882-1/>
- <https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16890>
- <https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E>
- <https://cert-portal.siemens.com/productcert/pdf/ssa-436177.pdf>
- <https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html>
- <https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html>
- <https://support.f5.com/csp/article/K03314397?utm_source=f5support&amp%3Butm_medium=RSS>
- <https://access.redhat.com/errata/RHSA-2019:3701>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2018-16890) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_