VulnerabilityModified
CVE-2021-31873
Additions in the malloc() function may result in an integer overflow and a subsequent heap buffer overflow.
CRITICAL 9.8EPSS 2.17%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.17%). 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. Additions in the malloc() 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
- 2.17% probability · 81th 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=a31ae8c508fc8d1bca4f57e9f9f88127572d5202Patch, Third Party Advisory
- https://github.com/huolinjue/klibc/commit/a31ae8c508fc8d1bca4f57e9f9f88127572d5202
- 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=a31ae8c508fc8d1bca4f57e9f9f88127572d5202Patch, Third Party Advisory
- https://github.com/huolinjue/klibc/commit/a31ae8c508fc8d1bca4f57e9f9f88127572d5202
- 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.