CVE-2018-14618
curl: NTLM password overflow via integer overflow
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.)
curl en versiones anteriores a la 7.61.1 es vulnerable a un desbordamiento de búfer en el código de autenticación NTLM. La función interna Curl_ntlm_core_mk_nt_hash multiplica la longitud de la contraseña por dos (SUM) para adivinar qué tamaño debe tener la zona de almacenamiento temporal que se va a asignar desde la memoria dinámica (heap). El valor de longitud se emplea a continuación para iterar sobre la contraseña y generar una salida en el búfer de almacenamiento asignado. En sistemas con un size_t de 32 bits, la matemática para calcular SUM desencadena un desbordamiento de enteros cuando la contraseña excede los 2 GB (2^31 bytes). Este desbordamiento de enteros suele provocar que un búfer muy pequeño se asigne en lugar del planeado (uno muy grande), por lo que su uso termina con un desbordamiento de búfer basado en memoria dinámica (heap). (Este error es casi idéntico a CVE-2017-8816).
CVSS Scores
SSVC
- Decision:-
Timeline
- 2018-07-27 CVE Reserved
- 2018-09-05 CVE Published
- 2024-06-20 EPSS Updated
- 2024-08-05 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-122: Heap-based Buffer Overflow
- CWE-131: Incorrect Calculation of Buffer Size
- CWE-190: Integer Overflow or Wraparound
CAPEC
References (13)
| URL | Tag | Source |
|---|---|---|
| http://www.securitytracker.com/id/1041605 | Third Party Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14618 | Issue Tracking | |
| https://cert-portal.siemens.com/productcert/pdf/ssa-436177.pdf | X_refsource_confirm |
|
| https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0014 | Third Party Advisory |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2018:3558 | 2019-04-22 | |
| https://access.redhat.com/errata/RHSA-2019:1880 | 2019-04-22 | |
| https://curl.haxx.se/docs/CVE-2018-14618.html | 2019-04-22 | |
| https://security.gentoo.org/glsa/201903-03 | 2019-04-22 | |
| https://usn.ubuntu.com/3765-1 | 2019-04-22 | |
| https://usn.ubuntu.com/3765-2 | 2019-04-22 | |
| https://www.debian.org/security/2018/dsa-4286 | 2019-04-22 | |
| https://access.redhat.com/security/cve/CVE-2018-14618 | 2019-07-29 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1622707 | 2019-07-29 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Haxx Search vendor "Haxx" | Libcurl Search vendor "Haxx" for product "Libcurl" | < 7.61.1 Search vendor "Haxx" for product "Libcurl" and version " < 7.61.1" | - |
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04" | esm |
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04" | lts |
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04" | lts |
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04" | lts |
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
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| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 6.0 Search vendor "Redhat" for product "Enterprise Linux" and version "6.0" | - |
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| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0" | - |
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| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 7.4 Search vendor "Redhat" for product "Enterprise Linux" and version "7.4" | - |
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| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 7.5 Search vendor "Redhat" for product "Enterprise Linux" and version "7.5" | - |
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| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 7.6 Search vendor "Redhat" for product "Enterprise Linux" and version "7.6" | - |
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