CVE-2018-0733

Incorrect CRYPTO_memcmp on HP-UX PA-RISC

Severity Score

5.9

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Because of an implementation bug the PA-RISC CRYPTO_memcmp function is effectively reduced to only comparing the least significant bit of each byte. This allows an attacker to forge messages that would be considered as authenticated in an amount of tries lower than that guaranteed by the security claims of the scheme. The module can only be compiled by the HP-UX assembler, so that only HP-UX PA-RISC targets are affected. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g).

Debido a un error de implementación, la función CRYPTO_memcmp en PA-RISC únicamente compara el bit menos significativo o de menor peso de cada byte. Esto permite que un atacante falsifique mensajes que se considerarían como autenticados en una cantidad de intentos menor que los que aseguran las garantías de seguridad del esquema. El módulo solo se puede compilar con un ensamblador HP-UX, de forma que solo se ven afectados los PA-RISC de HP-UX. Solucionado en OpenSSL 1.1.0h (versiones 1.1.0-1.1.0g afectadas).

*Credits: Peter Waltenberg (IBM)

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-11-30 CVE Reserved
2018-03-27 CVE Published
2024-06-30 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (14)

URL	Tag	Source
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html	X_refsource_confirm
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html	X_refsource_confirm
http://www.securityfocus.com/bid/103517	Third Party Advisory
http://www.securitytracker.com/id/1040576	Third Party Advisory
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=56d5a4bfcaf37fa420aef2bb881aa55e61cf5f2f	X_refsource_confirm
https://security.netapp.com/advisory/ntap-20180330-0002	Third Party Advisory
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html	X_refsource_misc
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html	X_refsource_confirm
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html	X_refsource_misc
https://www.tenable.com/security/tns-2018-04	X_refsource_confirm
https://www.tenable.com/security/tns-2018-06	X_refsource_confirm
https://www.tenable.com/security/tns-2018-07	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://security.gentoo.org/glsa/201811-21	2023-11-07
https://www.openssl.org/news/secadv/20180327.txt	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openssl Search vendor "Openssl"		Openssl Search vendor "Openssl" for product "Openssl"				>= 1.1.0 <= 1.1.0g Search vendor "Openssl" for product "Openssl" and version " >= 1.1.0 <= 1.1.0g"		-		Affected