OSV-2021-1422 Heap-buffer-overflow in fr_dns_label_uncompressed_length
A heap buffer overflow in FreeRADIUS allows remote attackers to cause denial of service or potentially execute code via crafted DNS labels.
- 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-2021-1422?
OSV-2021-1422 is a memory corruption vulnerability in freeradius, published on 8 Oct 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=39657
Crash type: Heap-buffer-overflow READ 1
Crash state:
fr_dns_label_uncompressed_length
decode_value_trampoline
fr_struct_from_network
Which versions are affected by OSV-2021-1422?
1 open source package ship an affected version, including freeradius.
| Package | Affected | Fixed in |
|---|---|---|
freeradius OSS-Fuzz | All versions | None |
How do I fix OSV-2021-1422?
No fix has been published for OSV-2021-1422 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-2021-1422 being exploited?
There is no known exploitation of OSV-2021-1422 in the wild and no public exploit code.