OSV-2017-83 Heap-buffer-overflow in idn2_lookup_u8
A heap-buffer-overflow in libidn2 allows attackers to cause denial of service or potentially execute code via crafted IDN 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-2017-83?
OSV-2017-83 is a memory corruption vulnerability in libpsl, 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=2262
Crash type: Heap-buffer-overflow READ 4
Crash state:
idn2_lookup_u8
_psl_idna_toASCII
_add_punycode_if_needed
Which versions are affected by OSV-2017-83?
1 open source package ship an affected version, including libpsl.
| Package | Affected | Fixed in |
|---|---|---|
libpsl OSS-Fuzz | All versions | None |
How do I fix OSV-2017-83?
No fix has been published for OSV-2017-83 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-2017-83 being exploited?
There is no known exploitation of OSV-2017-83 in the wild and no public exploit code.