Описание
Open Babel has NULL pointer dereference in MOL2 OBAtom::SetFormalCharge
Summary
A memory-safety vulnerability in Open Babel's MOL2 file format parser caused a NULL pointer dereference when reading a crafted input file.
Details
The flaw was in OBAtom::SetFormalCharge as called from the MOL2
parser. A malformed atom record caused the parser to call the method
on a NULL atom pointer.
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 MOL2 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/e23a224b Tracked in #2862.
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 by Vedant Madane (@VedantMadane) via VulDB.
Ссылки
- https://github.com/openbabel/openbabel/security/advisories/GHSA-4w5w-4fhm-q483
- https://nvd.nist.gov/vuln/detail/CVE-2026-2705
- https://github.com/openbabel/openbabel/issues/2848
- https://github.com/openbabel/openbabel/pull/2862
- https://github.com/VedantMadane/openbabel/commit/e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a
- https://github.com/oneafter/0128/blob/main/ob2/repro.mol2
- https://vuldb.com/?ctiid.346651
- https://vuldb.com/?id.346651
- https://vuldb.com/?submit.754379
Пакеты
openbabel
< 3.2.0
3.2.0
Связанные уязвимости
A vulnerability was detected in Open Babel up to 3.1.1. The impacted element is the function OBAtom::SetFormalCharge in the library include/openbabel/atom.h of the component MOL2 File Handler. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit is now public and may be used. The patch is identified as e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a. A patch should be applied to remediate this issue. The project was informed of the problem early through an issue report but has not responded yet.
A vulnerability was detected in Open Babel up to 3.1.1. The impacted element is the function OBAtom::SetFormalCharge in the library include/openbabel/atom.h of the component MOL2 File Handler. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit is now public and may be used. The patch is identified as e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a. A patch should be applied to remediate this issue. The project was informed of the problem early through an issue report but has not responded yet.
A vulnerability was detected in Open Babel up to 3.1.1. The impacted e ...
Уязвимость компонента MOL2 File Handler программного обеспечения преобразования форматов файлов химических веществ Open Babel, позволяющая нарушителю получить несанкционированный доступ к защищаемой информации
