Vulnerability Monitor

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CVE-2018-0733

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).

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.9, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts integrity (unauthorized modifications), for affected systems. Impacting 1 product from openssl organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2018, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2018-03-27T21:29:00.610

Last Modified

2024-11-21T03:38:49.937

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 5.9 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
NVD-CWE-noinfo

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	openssl	openssl	≤ 1.1.0g	Yes

References

http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html ([email protected])
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html ([email protected])
http://www.securityfocus.com/bid/103517 Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1040576 Third Party Advisory, VDB Entry ([email protected])
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=56d5a4bfcaf37fa420aef2bb881aa55e61cf5f2f ([email protected])
https://security.gentoo.org/glsa/201811-21 ([email protected])
https://security.netapp.com/advisory/ntap-20180330-0002/ Third Party Advisory ([email protected])
https://www.openssl.org/news/secadv/20180327.txt Vendor Advisory ([email protected])
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html ([email protected])
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html ([email protected])
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html ([email protected])
https://www.tenable.com/security/tns-2018-04 ([email protected])
https://www.tenable.com/security/tns-2018-06 ([email protected])
https://www.tenable.com/security/tns-2018-07 ([email protected])
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/103517 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1040576 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=56d5a4bfcaf37fa420aef2bb881aa55e61cf5f2f (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/201811-21 (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20180330-0002/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.openssl.org/news/secadv/20180327.txt Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html (af854a3a-2127-422b-91ae-364da2661108)
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html (af854a3a-2127-422b-91ae-364da2661108)
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html (af854a3a-2127-422b-91ae-364da2661108)
https://www.tenable.com/security/tns-2018-04 (af854a3a-2127-422b-91ae-364da2661108)
https://www.tenable.com/security/tns-2018-06 (af854a3a-2127-422b-91ae-364da2661108)
https://www.tenable.com/security/tns-2018-07 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For openssl's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.