Vulnerability Details : CVE-2021-27435
Potential exploit
ARM mbed product Version 6.3.0 is vulnerable to integer wrap-around in malloc_wrapper function, which can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.
Vulnerability category: Overflow
Products affected by CVE-2021-27435
- cpe:2.3:o:arm:mbed:6.3.0:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-27435
0.54%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 65 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-27435
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
7.3
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
3.9
|
3.4
|
ICS-CERT | |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2021-27435
-
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.Assigned by: ics-cert@hq.dhs.gov (Primary)
References for CVE-2021-27435
-
https://github.com/ARMmbed/mbed-os/pull/14408
Add integer overflow check to the malloc wrappers by LDong-Arm · Pull Request #14408 · ARMmbed/mbed-os · GitHubExploit;Issue Tracking;Patch;Third Party Advisory
-
https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04
Multiple RTOS (Update D) | CISAThird Party Advisory;US Government Resource
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