CVE-2018-16890

Impact:
Moderate
Public Date:
2019-02-06
CWE:
CWE-125
Bugzilla:
1670252: CVE-2018-16890 curl: NTLM type-2 heap out-of-bounds buffer read
An out-of-bounds read flaw was found in the way curl handled NTLMv2 type-2 headers. When connecting to a remote malicious server which uses NTLM authentication, the flaw could cause curl to crash.

Find out more about CVE-2018-16890 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

The versions of curl package shipped with Red Hat Enterprise Linux 5, 6, and 7 do not support NTLMv2 type-2 headers, hence they are not affected by this flaw.

CVSS v3 metrics

NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.

CVSS3 Base Score 4.3
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality None
Integrity Impact None
Availability Impact Low

Affected Packages State

Platform Package State
Red Hat Virtualization 4 curl Under investigation
Red Hat Software Collections for Red Hat Enterprise Linux httpd24-curl Affected
Red Hat JBoss Web Server 5 curl Under investigation
Red Hat JBoss Core Services 1 curl Under investigation
Red Hat Enterprise Linux 7 curl Not affected
Red Hat Enterprise Linux 6 curl Not affected
Red Hat Enterprise Linux 5 curl Not affected
.NET Core 2.0 on Red Hat Enterprise Linux rh-dotnet22-curl Under investigation
.NET Core 2.0 on Red Hat Enterprise Linux rh-dotnet21-curl Under investigation
.NET Core 1.0 on Red Hat Enterprise Linux rh-dotnetcore10-curl Under investigation
.NET Core 1.0 on Red Hat Enterprise Linux rh-dotnetcore11-curl Under investigation

Acknowledgements

Red Hat would like to thank Daniel Stenberg (the Curl project) for reporting this issue. Upstream acknowledges Wenxiang Qian (Tencent Blade Team) as the original reporter.

Mitigation

Turn off NTLM authentication.

External References

Last Modified