National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2018-14618 Detail

Current Description

curl before version 7.61.1 is vulnerable to a buffer overrun in the NTLM authentication code. The internal function Curl_ntlm_core_mk_nt_hash multiplies the length of the password by two (SUM) to figure out how large temporary storage area to allocate from the heap. The length value is then subsequently used to iterate over the password and generate output into the allocated storage buffer. On systems with a 32 bit size_t, the math to calculate SUM triggers an integer overflow when the password length exceeds 2GB (2^31 bytes). This integer overflow usually causes a very small buffer to actually get allocated instead of the intended very huge one, making the use of that buffer end up in a heap buffer overflow. (This bug is almost identical to CVE-2017-8816.)

Source:  MITRE
Description Last Modified:  09/05/2018
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 9.8 CRITICAL
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (V3 legend)
Impact Score: 5.9
Exploitability Score: 3.9


Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 10.0 HIGH
Vector: (AV:N/AC:L/Au:N/C:C/I:C/A:C) (V2 legend)
Impact Subscore: 10.0
Exploitability Subscore: 10.0


Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.securitytracker.com/id/1041605 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2018:3558 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14618 Issue Tracking
https://curl.haxx.se/docs/CVE-2018-14618.html Vendor Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0014 Third Party Advisory
https://usn.ubuntu.com/3765-1/ Third Party Advisory
https://usn.ubuntu.com/3765-2/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4286 Third Party Advisory

Technical Details

Vulnerability Type (View All)

  • Integer Overflow or Wraparound (CWE-190)

Change History

6 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-14618
NVD Published Date:
09/05/2018
NVD Last Modified:
01/18/2019