OSV-2021-857 Heap-buffer-overflow in mk_string_copy_substr
A heap buffer overflow in Mongoose web server allows attackers to cause denial of service or potentially execute code via crafted requests.
- 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-2021-857?
OSV-2021-857 is a memory corruption vulnerability in fluent-bit, published on 14 Jun 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=35202
Crash type: Heap-buffer-overflow READ {*}
Crash state:
mk_string_copy_substr
mk_rconf_meta_add
mk_rconf_read
Which versions are affected by OSV-2021-857?
1 open source package ship an affected version, including fluent-bit.
| Package | Affected | Fixed in |
|---|---|---|
fluent-bit OSS-Fuzz | All versions | None |
How do I fix OSV-2021-857?
No fix has been published for OSV-2021-857 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-2021-857 being exploited?
There is no known exploitation of OSV-2021-857 in the wild and no public exploit code.