Integer overflow in Klibc Project
CVE-2021-31870
An issue was discovered in klibc before 2.0.9. Multiplication in the calloc() function may result in an integer overflow and a subsequent heap buffer overflow.
Vulnerability class: Integer Overflow
EPSS: 0.021 (79.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Klibc_project Klibc
- Debian Debian_linux — versions 9.0
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Third Party Advisory, x_refsource_MISC, Release Notes)
- cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Mailing List, Third Party Advisory, x_refsource_MISC, Release Notes)
- cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory, Release Notes)
- cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-31870?
- CVE-2021-31870 is a critical-severity vulnerability in Klibc Project, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2021-04-30.
- How severe is CVE-2021-31870?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-31870 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.