OSV-2020-2171 Stack-buffer-overflow in fp_read_unsigned_bin
A stack buffer overflow in wolfSSL's RSA public key decoding allows attackers to cause denial of service or potentially execute code via crafted keys.
- 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-2020-2171?
OSV-2020-2171 is a memory corruption vulnerability in wolfssl, published on 21 Nov 2020. 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=27666
Crash type: Stack-buffer-overflow READ 8
Crash state:
fp_read_unsigned_bin
mp_read_unsigned_bin
wc_RsaPublicKeyDecodeRaw
Which versions are affected by OSV-2020-2171?
1 open source package ship an affected version, including wolfssl.
| Package | Affected | Fixed in |
|---|---|---|
wolfssl OSS-Fuzz | All versions | None |
How do I fix OSV-2020-2171?
No fix has been published for OSV-2020-2171 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-2020-2171 being exploited?
There is no known exploitation of OSV-2020-2171 in the wild and no public exploit code.