OSV-2020-1839 UNKNOWN READ in flb_sds_cat
An attacker can cause a denial of service in Fluent Bit via a crafted message triggering an unknown read in the GELF formatter.
- 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-2020-1839?
OSV-2020-1839 is a memory corruption vulnerability in fluent-bit, published on 25 Sep 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=25904
Crash type: UNKNOWN READ
Crash state:
flb_sds_cat
flb_msgpack_gelf_key
flb_msgpack_gelf_flatten
Which versions are affected by OSV-2020-1839?
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-2020-1839?
No fix has been published for OSV-2020-1839 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-2020-1839 being exploited?
There is no known exploitation of OSV-2020-1839 in the wild and no public exploit code.