OSV-2020-189 Stack-buffer-overflow in tvb_get_ipv4_addr_with_prefix_len
A stack buffer overflow in the Wireshark IS-IS dissector allows remote attackers to cause denial of service or potentially execute code via crafted packets.
- 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-2020-189?
OSV-2020-189 is a memory corruption vulnerability in wireshark, published on 24 Jun 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=21718
Crash type: Stack-buffer-overflow READ 4
Crash state:
tvb_get_ipv4_addr_with_prefix_len
dissect_lsp_ext_ip_reachability_clv
isis_dissect_clvs
Which versions are affected by OSV-2020-189?
1 open source package ship an affected version, including wireshark.
| Package | Affected | Fixed in |
|---|---|---|
wireshark OSS-Fuzz | All versions | None |
How do I fix OSV-2020-189?
No fix has been published for OSV-2020-189 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-2020-189 being exploited?
There is no known exploitation of OSV-2020-189 in the wild and no public exploit code.