CVE-2020-12885

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Summary

CVECVE-2020-12885
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-06-18 19:15:00 UTC
Updated2020-06-25 14:35:00 UTC
DescriptionAn infinite loop was discovered in the CoAP library in Arm Mbed OS 5.15.3. The CoAP parser is responsible for parsing received CoAP packets. The function sn_coap_parser_options_parse_multiple_options() parses CoAP options in a while loop. This loop's exit condition is computed using the previously allocated heap memory required for storing the result of parsing multiple options. If the input heap memory calculation results in zero bytes, the loop exit condition is never met and the loop is not terminated. As a result, the packet parsing function never exits, leading to resource consumption.

Risk And Classification

Problem Types: CWE-835

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Arm Mbed Os 5.15.3 All All All
Operating System Arm Mbed Os 5.15.3 All All All

References

ReferenceSourceLinkTags
Bugfix/coap parser mem access bugs by mjurczak · Pull Request #116 · ARMmbed/mbed-coap · GitHub CONFIRM github.com Third Party Advisory
Infinite loop in MbedOS CoAP library parser · Issue #12929 · ARMmbed/mbed-os · GitHub MISC github.com Third Party Advisory
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