OSV-2021-696 UNKNOWN READ in ntlm_decode_type2_target
An out-of-bounds read in cURL's NTLM authentication decoding can cause a crash, potentially leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not stated
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2021-696?
OSV-2021-696 is a memory corruption vulnerability in curl, published on 28 Apr 2021. It can be exploited over the network, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33720
Crash type: UNKNOWN READ
Crash state:
ntlm_decode_type2_target
Curl_auth_decode_ntlm_type2_message
Curl_sasl_continue
Which versions are affected by OSV-2021-696?
1 open source package ship an affected version, including curl.
| Package | Affected | Fixed in |
|---|---|---|
curl OSS-Fuzz | All versions | None |
How do I fix OSV-2021-696?
No fix has been published for OSV-2021-696 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-2021-696 being exploited?
There is no known exploitation of OSV-2021-696 in the wild and no public exploit code.