CVE-2018-14618 (GCVE-0-2018-14618)

Vulnerability from cvelistv5 – Published: 2018-09-05 19:00 – Updated: 2026-04-15 20:54
VLAI
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.)
Severity
7.5 (High)
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
URL Tags
https://curl.haxx.se/docs/CVE-2018-14618.html x_refsource_CONFIRM
https://security.gentoo.org/glsa/201903-03 vendor-advisoryx_refsource_GENTOO
https://usn.ubuntu.com/3765-1/ vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2018:3558 vendor-advisoryx_refsource_REDHAT
https://psirt.global.sonicwall.com/vuln-detail/SN… x_refsource_CONFIRM
https://www.debian.org/security/2018/dsa-4286 vendor-advisoryx_refsource_DEBIAN
http://www.securitytracker.com/id/1041605 vdb-entryx_refsource_SECTRACK
https://usn.ubuntu.com/3765-2/ vendor-advisoryx_refsource_UBUNTU
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… x_refsource_CONFIRM
https://cert-portal.siemens.com/productcert/pdf/s… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2019:1880 vendor-advisoryx_refsource_REDHAT
Impacted products
Vendor Product Version
[UNKNOWN] curl Affected: 7.61.1
Create a notification for this product.
Date Public
2018-09-05 00:00
Show details on NVD website
To clipboard 

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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.