Vulnerability Details CVE-2021-26706
An issue was discovered in lib_mem.c in Micrium uC/OS uC/LIB 1.38.x and 1.39.00. The following memory allocation functions do not check for integer overflow when allocating a pool whose size exceeds the address space: Mem_PoolCreate, Mem_DynPoolCreate, and Mem_DynPoolCreateHW. Because these functions use multiplication to calculate the pool sizes, the operation may cause an integer overflow if the arguments are large enough. The resulting memory pool will be smaller than expected and may be exploited by an attacker.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.008
EPSS Ranking 72.3%
CVSS Severity
CVSS v3 Score 9.8
CVSS v2 Score 7.5
References
- https://docs.silabs.com/micrium/latest/micrium-common/
- https://micrium.atlassian.net/wiki/spaces/libdoc138/
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04
- https://docs.silabs.com/micrium/latest/micrium-common/
- https://micrium.atlassian.net/wiki/spaces/libdoc138/
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04
Products affected by CVE-2021-26706
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cpe:2.3:a:micrium:uc/lib:1.38.00
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cpe:2.3:a:micrium:uc/lib:1.38.01
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cpe:2.3:a:micrium:uc/lib:1.38.02
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cpe:2.3:a:micrium:uc/lib:1.38.03
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cpe:2.3:a:micrium:uc/lib:1.38.04
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cpe:2.3:a:micrium:uc/lib:1.38.05
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cpe:2.3:a:micrium:uc/lib:1.39.00