OSV-2020-1655 Heap-buffer-overflow in zmq_z85_decode
A heap-buffer-overflow in ZeroMQ's Z85 decoder allows attackers to cause denial of service or potentially execute code via crafted input.
- 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-2020-1655?
OSV-2020-1655 is a memory corruption vulnerability in libzmq, published on 24 Aug 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=25167
Crash type: Heap-buffer-overflow READ {*}
Crash state:
zmq_z85_decode
zmq::options_t::set_curve_key
zmq::options_t::setsockopt
Which versions are affected by OSV-2020-1655?
1 open source package ship an affected version, including libzmq.
| Package | Affected | Fixed in |
|---|---|---|
libzmq OSS-Fuzz | All versions | None |
How do I fix OSV-2020-1655?
No fix has been published for OSV-2020-1655 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-2020-1655 being exploited?
There is no known exploitation of OSV-2020-1655 in the wild and no public exploit code.