5.3

CVE-2023-28756: debian debian_linux

CVSS: 5.3v3.1MediumModified
AliasesALPINE-CVE-2023-28756UBUNTU-CVE-2023-28756DEBIAN-CVE-2023-28756
Published 31-03-2023Last modified 04-11-2025
Open JSON

Vulnerability summary

CVE-2023-28756 is a medium (CVSS 5.3) vulnerability in debian debian_linux. EPSS estimates a 2.45% chance of exploitation in the next 30 days, higher than 84.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (NVD)
EPSS score
2.45%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 16 · Related 7
DLA-3408-1DLA-3447-1DLA-3858-1RHSA-2023:3291RHSA-2023:3821RHSA-2023:7025

Timeline

  1. 31-03-2023
    PublishedVulnerability first disclosed.
  2. 04-11-2025
    Last modifiedVulnerability information updated.

Description

A ReDoS issue was discovered in the Time component through 0.2.1 in Ruby through 3.2.1. The Time parser mishandles invalid URLs that have specific characters. It causes an increase in execution time for parsing strings to Time objects. The fixed versions are 0.1.1 and 0.2.2.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

2.45%

Chance of exploitation in the next 30 days

Percentile

84%

Versus all other CVEs

30-day change

0.00 pp

From 2.45% on 19-09-2026

19-09-202619-10-2026
EPSS score
2.45%

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

Affected systems

Ubuntu5 products
  • jrubyAll versions (No fix recorded)
  • ruby2.3< 2.3.1-2~ubuntu16.04.16+esm7
  • ruby2.5< 2.5.1-1ubuntu1.16
  • ruby2.7< 2.7.0-5ubuntu1.11
  • ruby3.0< 3.0.2-7ubuntu2.4
Debian3 products
  • jrubyAll versions (No fix recorded) | < 9.4.5.0+ds-1
  • ruby3.1All versions (No fix recorded)
  • debian_linuxEOL10.0
Chainguard2 products
  • ruby-3.1< 3.1.4-r0
  • ruby-3.2< 3.2.2-r0
Ruby-lang2 products
Wolfi2 products
  • ruby-3.1< 3.1.4-r0
  • ruby-3.2< 3.2.2-r0
Alpine1 product
  • ruby< 2.7.8-r0 | < 3.0.6-r0 | < 3.1.4-r0
Fedoraproject1 product
RubyGems1 product
  • time≥ 0.2.0, < 0.2.2 | < 0.1.1

8 vendors · 17 products

References

36 links
Show all 36 references