7.1

CVE-2021-35940: apache software foundation apache portable runtime (apr) Out-of-bounds Read

CVSS: 7.1v3.1HighModified
AliasesALPINE-CVE-2021-35940MGASA-2021-0428UBUNTU-CVE-2021-35940
Published 23-08-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-35940 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in apache software foundation apache portable runtime (apr). EPSS estimates a 1.19% chance of exploitation in the next 30 days, higher than 67.3% of scored vulnerabilities.

Overall risk
29/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (NVD)
EPSS score
1.19%
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. 23-08-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

An out-of-bounds array read in the apr_time_exp*() functions was fixed in the Apache Portable Runtime 1.6.3 release (CVE-2017-12613). The fix for this issue was not carried forward to the APR 1.7.x branch, and hence version 1.7.0 regressed compared to 1.6.3 and is vulnerable to the same issue.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

1.19%

Chance of exploitation in the next 30 days

Percentile

67%

Versus all other CVEs

30-day change

0.00 pp

From 1.19% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.19%

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

Alpine1 product
  • apr< 1.7.0-r1 | < 1.7.0-r2
Apache1 product
Apache software foundation1 product
Debian1 product
  • apr< 1.7.0-7
Mageia1 product
  • apr< 1.7.0-3.2.mga8
Opensuse1 product
  • apr&distro=openSUSE Tumbleweed< 1.7.0-4.1
Oracle1 product
Ubuntu1 product
  • apr< 1.5.0-1ubuntu0.1~esm1 | < 1.5.2-3ubuntu0.1~esm1 | < 1.7.0-6ubuntu1

8 vendors · 8 products

References

28 links
Show all 28 references