5

CVE-2012-0840: apache portable_runtime Improper Input Validation

CVSS: 5.0v2.0MediumModified
AliasesDEBIAN-CVE-2012-0840
Published 10-02-2012Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2012-0840 is a medium (CVSS 5.0) Improper Input Validation vulnerability in apache portable_runtime. EPSS estimates a 42.14% chance of exploitation in the next 30 days, higher than 98.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
38/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.0/10
010
Medium · v2.0 (NVD)
EPSS score
42.14%
0%100%
High · -1.21 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1exploit-database

Timeline

  1. 10-02-2012
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

tables/apr_hash.c in the Apache Portable Runtime (APR) library through 1.4.5 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

42.14%

Chance of exploitation in the next 30 days

Percentile

99%

Versus all other CVEs

30-day change

-1.21 pp

From 43.35% on 19-09-2026

19-09-202619-10-2026
EPSS score
42.14%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • exploit-databasedoslinuxVerified

    Apache APR - Hash Collision Denial of Service

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Apache1 product
  • portable_runtime≤ 1.4.5 | 0.9.1 | 0.9.2 | 0.9.2-dev | 0.9.3 | 0.9.3-dev | 0.9.4 | 0.9.5 | 0.9.6 | 0.9.7 | 0.9.7-dev | 0.9.8 | 0.9.9 | 0.9.16-dev | 1.3.0 | 1.3.1 | 1.3.2 | 1.3.3 | 1.3.4 | 1.3.4-dev | 1.3.5 | 1.3.6 | 1.3.6-dev | 1.3.7 | 1.3.8 | 1.3.9 | 1.3.10 | 1.3.11 | 1.3.12 | 1.3.13 | 1.4.0 | 1.4.1 | 1.4.2 | 1.4.3 | 1.4.4
Debian1 product
  • apr< 1.4.6-1

2 vendors · 2 products

References

11 links
Show all 11 references