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Vulnerability details: VCID-zz1m-bh57-9ben
Vulnerability ID VCID-zz1m-bh57-9ben
Aliases CVE-2018-0733
Summary 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).
Status Published
Exploitability 0.5
Weighted Severity 5.3
Risk 2.6
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-325 Missing Cryptographic Step
System Score Found at
cvssv3 4.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-0733.json
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
epss 0.00584 https://api.first.org/data/v1/epss?cve=CVE-2018-0733
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2018-0733
cvssv3 5.9 https://nvd.nist.gov/vuln/detail/CVE-2018-0733
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-0733.json
https://api.first.org/data/v1/epss?cve=CVE-2018-0733
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0733
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=56d5a4bfcaf37fa420aef2bb881aa55e61cf5f2f
https://security.gentoo.org/glsa/201811-21
https://security.netapp.com/advisory/ntap-20180330-0002/
https://www.openssl.org/news/secadv/20180327.txt
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
https://www.tenable.com/security/tns-2018-04
https://www.tenable.com/security/tns-2018-06
https://www.tenable.com/security/tns-2018-07
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
http://www.securityfocus.com/bid/103517
http://www.securitytracker.com/id/1040576
1561260 https://bugzilla.redhat.com/show_bug.cgi?id=1561260
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
CVE-2018-0733 https://nvd.nist.gov/vuln/detail/CVE-2018-0733
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-0733.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-0733
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-0733
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.68013
EPSS Score 0.00584
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T09:04:41.451416+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.7/main.json 37.0.0