OSV-2020-430 Stack-use-after-return in OSSL_PARAM_get_int32
A stack-use-after-return vulnerability in OpenSSL's OSSL_PARAM_get_int32 function can cause a crash, potentially 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-2020-430?
OSV-2020-430 is an use after free vulnerability in openssl, published on 1 Jul 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=15114
Crash type: Stack-use-after-return READ 4
Crash state:
OSSL_PARAM_get_int32
md5_sha1_set_params
ssl3_final_finish_mac
Which versions are affected by OSV-2020-430?
1 open source package ship an affected version, including openssl.
| Package | Affected | Fixed in |
|---|---|---|
openssl OSS-Fuzz | All versions | None |
How do I fix OSV-2020-430?
No fix has been published for OSV-2020-430 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is OSV-2020-430 being exploited?
There is no known exploitation of OSV-2020-430 in the wild and no public exploit code.