CVE-2018-14618 Details

CVE-2018-14618

Published: 2018-09-05
Last Modified: 2019-04-22
CVE Author: NIST National Vulnerability Database
CVE Assigner: secalert@redhat.com
Summary

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.)

Analysis
Common Vulnerability Score System v2.0
Severity High
Base Score 10/10
Exploit Score 10/10
Access Vector Network
Access Complexity Low
Authentication None
Impact Score 10/10
Confidentiality Impact Complete
Availability Impact Complete
Integrity Impact Complete
Vector String AV:N/AC:L/Au:N/C:C/I:C/A:C
Common Vulnerability Score System v3.1
Severity Critical
Base Score 9.8/10
Exploit Score 3.9/10
Access Vector Network
Access Complexity Low
Privileges Required None
Impact Score 5.9/10
Confidentiality Impact High
Availability Impact High
Integrity Impact High
Scope Unchanged
User Interaction None
Vector String CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Products Reported
CPE Vulnerable Start Excluding
cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:* Yes - 7.61.1
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Yes - -
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* Yes - -
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Yes - -
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Yes - -
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Yes - -
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Yes - -
cpe:2.3:o:redhat:enterprise_linux:7.5:*:*:*:*:*:*:* Yes - -
cpe:2.3:o:redhat:enterprise_linux:7.6:*:*:*:*:*:*:* Yes - -
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Yes - -
cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:* Yes - -
References

https://curl.haxx.se/docs/CVE-2018-14618.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14618
https://www.debian.org/security/2018/dsa-4286
http://www.securitytracker.com/id/1041605
https://usn.ubuntu.com/3765-1/
https://usn.ubuntu.com/3765-2/
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0014
https://access.redhat.com/errata/RHSA-2018:3558
https://security.gentoo.org/glsa/201903-03
https://cert-portal.siemens.com/productcert/pdf/ssa-436177.pdf
https://access.redhat.com/errata/RHSA-2019:1880

CVE ID
CVE-2018-14618
Published
2018-09-05
Modified
2019-04-22
CVSSv2.0
High
CVSSv3.1
Critical
PCI Compliance
Fail
US-CERT Alert
No
CWE
CWE-190

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