Integer overflow in Klibc Project
CVE-2021-31873
An issue was discovered in klibc before 2.0.9. Additions in the malloc() function may result in an integer overflow and a subsequent heap buffer overflow.
Vulnerability class: Integer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.022 (81.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000
Affected products
- Klibc Project
- Debian Linux — versions 9.0
Weakness classification (CWE)
References
- kernel.org/pub/linux/libs/klibc/2.0/ (Third Party Advisory, Release Notes)
- lists.zytor.com/archives/klibc/2021-April/004593.html (Mailing List, Third Party Advisory, Release Notes)
- git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/ (Patch, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/04/30/1 (mailing-list, Mailing List, Third Party Advisory, Release Notes)
- lists.debian.org/debian-lts-announce/2021/06/msg00025.html (mailing-list, Mailing List, Third Party Advisory)
- github.com/huolinjue/klibc/commit/a31ae8c508fc8d1bca4f57e9f9f88127572d5202
Frequently asked questions
- What is CVE-2021-31873?
- CVE-2021-31873 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-2021-31873?
- Critical severity. CVSS v3 base score is 9.8 out of 10.