Описание
Open Babel has out-of-bounds write (overlapping memcpy) in zipstream basic_unzip_streambuf::underflow
Summary
A memory-safety vulnerability in Open Babel's bundled zipstream
decompression code caused an out-of-bounds write via overlapping
memcpy when reading a crafted gzip-compressed chemistry file.
Details
The flaw was in basic_unzip_streambuf::underflow. The decompression
buffer refill path invoked memcpy with overlapping source and
destination regions, which is undefined behavior and produced
out-of-bounds writes in practice. Any file format read through the
gzip-wrapped reader was a potential trigger.
Impact
Open Babel is a C++ library and CLI used to read and write chemistry
file formats; it is shipped by Linux distributions and embedded in
services that may parse untrusted input. Triggering this vulnerability
requires the victim to open a malicious gzip-compressed chemistry file
with the obabel tool, the OBConversion API, or any of the language
bindings (Python, Ruby, Java, R, Perl, C#, PHP).
Affected versions
All releases up to and including 3.1.1.
Patched version
3.2.0 (released 2026-05-26).
Patch
Fix commit: https://github.com/openbabel/openbabel/commit/d4621d41 Originally reported as #2832; fixes consolidated in #2913.
A minimized reproducer for this CVE is checked in under
test/files/fuzz_regress/ and is exercised on every CI build under
ASAN+UBSAN by the fuzzregresstest harness.
Credit
Reported via OSS-Fuzz.
Ссылки
- https://github.com/openbabel/openbabel/security/advisories/GHSA-8j3x-m868-cpw8
- https://nvd.nist.gov/vuln/detail/CVE-2025-10995
- https://github.com/openbabel/openbabel/issues/2832
- https://github.com/openbabel/openbabel/issues/2913
- https://github.com/openbabel/openbabel/commit/d4621d417c167b50cc8ce7aa3a02557e5b2b81c5
- https://github.com/user-attachments/files/22318572/poc.zip
- https://vuldb.com/?ctiid.325923
- https://vuldb.com/?id.325923
- https://vuldb.com/?submit.654059
Пакеты
openbabel
< 3.2.0
3.2.0
Связанные уязвимости
A security vulnerability has been detected in Open Babel up to 3.1.1. This vulnerability affects the function zlib_stream::basic_unzip_streambuf::underflow in the library /src/zipstreamimpl.h. Such manipulation leads to memory corruption. Local access is required to approach this attack. The exploit has been disclosed publicly and may be used.
A security vulnerability has been detected in Open Babel up to 3.1.1. This vulnerability affects the function zlib_stream::basic_unzip_streambuf::underflow in the library /src/zipstreamimpl.h. Such manipulation leads to memory corruption. Local access is required to approach this attack. The exploit has been disclosed publicly and may be used.
A security vulnerability has been detected in Open Babel up to 3.1.1. ...
Уязвимость функции zlib_stream::basic_unzip_streambuf::underflow программного обеспечения преобразования форматов файлов химических веществ Open Babel, позволяющая нарушителю вызвать отказ в обслуживании
