5.9

CVE-2018-0733: openssl

CVSS: 5.9v3.0MediumModified
AliasesALPINE-CVE-2018-0733DEBIAN-CVE-2018-0733
Published 27-03-2018Last modified 16-09-2024
Open JSON

Vulnerability summary

CVE-2018-0733 is a medium (CVSS 5.9) vulnerability in openssl. EPSS estimates a 8.28% chance of exploitation in the next 30 days, higher than 94.8% of scored vulnerabilities.

Overall risk
25/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.9/10
010
Medium · v3.0 (NVD)
EPSS score
8.28%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 27-03-2018
    PublishedVulnerability first disclosed.
  2. 16-09-2024
    Last modifiedVulnerability information updated.

Description

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).

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

8.28%

Chance of exploitation in the next 30 days

Percentile

95%

Versus all other CVEs

30-day change

0.00 pp

From 8.28% on 18-09-2026

18-09-202618-10-2026
EPSS score
8.28%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Alpine1 product
  • openssl≥ 1.1.0, < 1.0.2o-r0
Debian1 product
  • openssl< 1.1.0h-1
Openssl1 product
  • opensslFixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g) | ≥ 1.1.0, ≤ 1.1.0g

3 vendors · 3 products

References

16 links
Show all 16 references