fix wiremessage oob in case of intmin #2076
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prestonvasquez
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Jun 3, 2025
| @@ -406,7 +406,7 @@ func ReadMsgSectionDocumentSequence(src []byte) (identifier string, docs []bsonc | |||
| // sequence data. | |||
| func ReadMsgSectionRawDocumentSequence(src []byte) (identifier string, data []byte, rem []byte, ok bool) { | |||
| length, rem, ok := readi32(src) | |||
| if !ok || int(length) > len(src) || length-4 < 0 { | |||
| if !ok || int(length) > len(src) || length < 0 || length-4 < 0 { | |||
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Suggest checking length < 4 instead of length < 0 || length-4 < 0 .
We should also add a test for this.
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indeed, seems better
|
@kobrineli I'm closing this PR for the time being. If you're still interested in making the change, please open a new pull request with the suggestion applied. |
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API Change ReportNo changes found! |
prestonvasquez
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Jul 2, 2025
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Co-authored-by: Preston Vasquez <[email protected]>
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* master: (65 commits)
Replace all uses of 'interface{}' with 'any' in the bson package. (#2138)
GODRIVER-3473 Short-cicruit cursor.next() on invalid timeouts (#2135)
GODRIVER-3622 Automatically retry some test tasks. (#2147)
Replace all uses of 'interface{}' with 'any' in the repo docs. (#2142)
GODRIVER-3102: Perf comparison (#2134)
GODRIVER-3587 Use raw bytes in valueReader (#2120)
Replace all uses of 'interface{}' with 'any' in the internal/ packages. (#2140)
Replace all uses of 'interface{}' with 'any' in the x/ packages. (#2137)
GODRIVER-2016 Unskip all Transactions unified spec tests. (#2132)
GODRIVER-2540 Run govulncheck in CI builds. (#2136)
GODRIVER-3549 Update Client BulkWrite prose tests. (#2131)
Add guidelines for contributing features to the Go Driver (#2125)
Bump alcaeus/automatic-merge-up-action from 1.0.0 to 1.0.1 in the actions group (#2126)
Add wrappedMsgOnly to mongo.MarshalError and mongo.MongocryptError.
Bump testdata/specifications from `db69351` to `6689929`
fix wiremessage oob in case of intmin (#2076)
GODRIVER-3399: PoolClearedError should have TransientTransactionError label appended to it (#2114)
PR feedback.
Prevent integration tests from running when testing with -short
Skip AWS Test if no URI (#2102)
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Couldn't attach GODRIVER task number, 'cause I get 403 forbidden trying to access the project page.
Summary
If
lengthis in range fromINT_MIN(i.e. -2147483648) toINT_MIN+3,length-4 < 0check doesn't work as expected due to integer overflow.Getting too small length leads to check pass and further out of bound access.
Adding an additional check for length being smaller than zero solves the issue.