VulnerabilityModified
CVE-2021-31870
Multiplication in the calloc() function may result in an integer overflow and a subsequent heap buffer overflow.
CRITICAL 9.8EPSS 2.08%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.08%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.08% probability · 80th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-190
- Affected
- klibc project/klibc · debian/debian linux
- Source
- cve@mitre.org
References
- http://www.openwall.com/lists/oss-security/2021/04/30/1Mailing List, Release Notes, Third Party Advisory
- https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=292650f04c2b5348b4efbad61fb014ed09b4f3f2Patch, Third Party Advisory
- https://kernel.org/pub/linux/libs/klibc/2.0/Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00025.htmlMailing List, Third Party Advisory
- https://lists.zytor.com/archives/klibc/2021-April/004593.htmlMailing List, Release Notes, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/04/30/1Mailing List, Release Notes, Third Party Advisory
- https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=292650f04c2b5348b4efbad61fb014ed09b4f3f2Patch, Third Party Advisory
- https://kernel.org/pub/linux/libs/klibc/2.0/Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00025.htmlMailing List, Third Party Advisory
- https://lists.zytor.com/archives/klibc/2021-April/004593.htmlMailing List, Release Notes, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.