CVE-2026-31962
HighSummary
HTSlib to biblioteka do odczytu i zapisu formatów plików bioinformatycznych. W formacie CRAM, który przechowuje dane o wyrównaniu sekwencji DNA, występuje błąd w funkcji `cram_decode_seq()`, który może prowadzić do przepełnienia bufora na stercie. W wyniku tego błędu możliwe jest odczytanie i zapisanie danych w nieprzewidziany sposób.
Risk Assessment
Wykorzystanie tej podatności może prowadzić do awarii programu lub nadpisania danych i struktur sterty, co stwarza ryzyko uruchomienia dowolnego kodu. To może mieć poważne konsekwencje dla bezpieczeństwa systemu.
Recommendation
Zaleca się aktualizację biblioteki HTSlib do najnowszej wersji, która zawiera poprawki dla tej podatności. Należy również monitorować i weryfikować pliki CRAM przed ich otwarciem.
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Original NVD description (English source)
HTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data. While most alignment records store DNA sequence and quality values, the format also allows them to omit this data in certain cases to save space. Due to some quirks of the CRAM format, it is necessary to handle these records carefully as they will actually store data that needs to be consumed and then discarded. Unfortunately the `cram_decode_seq()` did not handle this correctly in some cases. Where this happened it could result in reading a single byte from beyond the end of a heap allocation, followed by writing a single attacker-controlled byte to the same location. Exploiting this bug causes a heap buffer overflow. If a user opens a file crafted to exploit this issue, it could lead to the program crashing, or overwriting of data and heap structures in ways not expected by the program. It may be possible to use this to obtain arbitrary code
Vulnerability data from NVD (NIST) · CISA KEV · EPSS