OSV-2020-50 Bad-cast to pcpp::IDnsResource from invalid vptr
A bad cast in the PcapPlusPlus library can cause a crash when processing malformed DNS packets, leading to denial of service.
- 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-2020-50?
OSV-2020-50 is a memory corruption vulnerability in pcapplusplus, 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=22872
Crash type: Bad-cast
Crash state:
Bad-cast to pcpp::IDnsResource from invalid vptr
pcpp::DnsLayer::~DnsLayer
pcpp::DnsLayer::~DnsLayer
Which versions are affected by OSV-2020-50?
1 open source package ship an affected version, including pcapplusplus.
| Package | Affected | Fixed in |
|---|---|---|
pcapplusplus OSS-Fuzz | All versions | None |
How do I fix OSV-2020-50?
No fix has been published for OSV-2020-50 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-2020-50 being exploited?
There is no known exploitation of OSV-2020-50 in the wild and no public exploit code.