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WS-2021-0028
Good to know:
Date: January 7, 2021
Affected versions of bam set the length of an internal buffer using self.compressed.set_len(block_size - HEADER_SIZE - MIN_EXTRA_SIZE) and then wrote into it. While block_size was constrained to a proper maximum, when it was too small the subtraction could overflow negatively to a large number past the capacity of self.compressed. This can result in memory corruption in the form of writing out of bounds when loading a bgzip file with a small block_size. Commit 061eee38d4 fixed this issue by checking for the underflow when setting the buffer size.
Language: RUST
Severity Score
Severity Score
Weakness Type (CWE)
Stack-based Buffer Overflow
CWE-121Top Fix
CVSS v3.1
Base Score: |
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Attack Vector (AV): | LOCAL |
Attack Complexity (AC): | LOW |
Privileges Required (PR): | NONE |
User Interaction (UI): | NONE |
Scope (S): | UNCHANGED |
Confidentiality (C): | NONE |
Integrity (I): | LOW |
Availability (A): | HIGH |