OSV-2018-41 Heap-buffer-overflow in Botan::bigint_monty_redc
A heap-buffer-overflow in Botan's Montgomery reduction allows attackers to cause denial of service or potentially execute code via crafted inputs.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2018-41?
OSV-2018-41 is a memory corruption vulnerability in botan, published on 13 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6581
Crash type: Heap-buffer-overflow READ 8
Crash state:
Botan::bigint_monty_redc
Botan::CurveGFp_Montgomery::curve_mul
Botan::CurveGFp_Montgomery::to_curve_rep
Which versions are affected by OSV-2018-41?
1 open source package ship an affected version, including botan.
| Package | Affected | Fixed in |
|---|---|---|
botan OSS-Fuzz | All versions | None |
How do I fix OSV-2018-41?
No fix has been published for OSV-2018-41 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is OSV-2018-41 being exploited?
There is no known exploitation of OSV-2018-41 in the wild and no public exploit code.