Vulnerability CVE-2021-31870
Published: 2021-04-30

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.

Type:

CWE-190

 (Integer Overflow or Wraparound)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Klibc project -> Klibc 

 References:
https://kernel.org/pub/linux/libs/klibc/2.0/
https://lists.zytor.com/archives/klibc/2021-April/004593.html
https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=292650f04c2b5348b4efbad61fb014ed09b4f3f2
http://www.openwall.com/lists/oss-security/2021/04/30/1
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