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CVE-2022-42004: Add check in `BeanDeserializer._deserializeFromArray()` to prevent use of deeply nested arrays · Issue #3582 · FasterXML/jackson-databind
In FasterXML jackson-databind before 2.13.4, resource exhaustion can occur because of a lack of a check in BeanDeserializer._deserializeFromArray to prevent use of deeply nested arrays. An application is vulnerable only with certain customized choices for deserialization.
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2.14
Issues possibly planned for 2.14
has-failing-test
Indicates that there exists a test case (under `failing/`) to reproduce the issue
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(note: found by oss-fuzz, see: https://bugs.chromium.org/p/oss-fuzz/issues)
Currently feature DeserializationFeature.UNWRAP_SINGLE_VALUE_ARRAYS is supported by most types, and deserializers tend to implement support using recursion, effectively allowing multiple nested layers of JSON Arrays to be unwrapped.
This is not a feature to support but just an implementation detail; ideally we should only allow a single JSON Array to wrap a value.
I think I have removed ability for deeper nesting from some other types so there may be some prior art.
cowtowncoder added to-evaluate
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2.14
Issues possibly planned for 2.14
and removed to-evaluate
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Aug 24, 2022
cowtowncoder changed the title Add check in BeanDeserializer._deserializeFromArray() to try to prevent use of deeply nested arrays Add check in BeanDeserializer._deserializeFromArray() to prevent use of deeply nested arrays
Aug 24, 2022
Hello dear @cowtowncoder,
I am Henry from Code Intelligence. First of all thank you for your quick fixes of this issue!
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=50490
Is this issue regarded as a security issue? If yes, we are thinking about applying CVE for it, so the community knows about it and will update to the latest version of jackson-databind.
Thank you for your fixes and support for OSS-Fuzz!
Best regards,
Henry
@henryrneh I think it is reasonable to file a CVE for this, although one caveat is that it is only applicable if users enable specific DeserializationFeature and not with vanilla (default) setting of ObjectMapper. So that should probably at least be reflect in applicability – I do not have any statistics of how common enabling this feature is but it probably is minority of usage.
@cowtowncoder thanks for your reply and info! We will communicate the information and handle the application to Google. Many thanks!
I already canceled the application. We will do our best to try not to apply CVEs for fuzz targets written by AdaLogics, however we will need some assitance or notification by you to know who wrote which fuzz target, because OSS-Fuzz is not designed to support this, maybe you can use some special prefix in the fuzz target name so it’s more obvious for us so we can filter it out?
We will do our best to try not to apply CVEs for fuzz targets written by AdaLogics
Great, thanks!
we will need some assitance or notification by you to know who wrote which fuzz target
Do the links I provided above suffice?
Thank you that works! In the future when AdaLogics add a new fuzz target please let us know or add some prefix to the name, so this will not happen again
Thank you that works! In the future when AdaLogics add a new fuzz target please let us know or add some prefix to the name, so this will not happen again
sounds good – I’ll also send over an email after the assessment so you can see details about the findings we got using Jazzer
Labels
2.14
Issues possibly planned for 2.14
has-failing-test
Indicates that there exists a test case (under `failing/`) to reproduce the issue
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