Vulnerability Description
libcurl versions from 7.36.0 to before 7.64.0 are vulnerable to a stack-based buffer overflow. The function creating an outgoing NTLM type-3 header (`lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()`), generates the request HTTP header contents based on previously received data. The check that exists to prevent the local buffer from getting overflowed is implemented wrongly (using unsigned math) and as such it does not prevent the overflow from happening. This output data can grow larger than the local buffer if very large 'nt response' data is extracted from a previous NTLMv2 header provided by the malicious or broken HTTP server. Such a 'large value' needs to be around 1000 bytes or more. The actual payload data copied to the target buffer comes from the NTLMv2 type-2 response header.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Haxx | Libcurl | >= 7.36.0, < 7.64.0 |
| Canonical | Ubuntu Linux | 14.04 |
| Debian | Debian Linux | 9.0 |
| Netapp | Active Iq Unified Manager | >= 7.3 |
| Netapp | Clustered Data Ontap | All versions |
| Netapp | Oncommand Insight | - |
| Netapp | Oncommand Workflow Automation | - |
| Netapp | Snapcenter | - |
| Siemens | Sinema Remote Connect Client | <= 2.0 |
| Oracle | Communications Operations Monitor | 3.4 |
| Oracle | Enterprise Manager Ops Center | 12.3.3 |
| Oracle | Http Server | 12.2.1.3.0 |
| Oracle | Mysql Server | <= 5.7.26 |
| Oracle | Secure Global Desktop | 5.4 |
| Oracle | Services Tools Bundle | 19.2 |
| Redhat | Enterprise Linux | 8.0 |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/106950Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2019:3701Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3822ExploitIssue TrackingPatch
- https://cert-portal.siemens.com/productcert/pdf/ssa-436177.pdfThird Party Advisory
- https://curl.haxx.se/docs/CVE-2019-3822.htmlPatchVendor Advisory
- https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37f
- https://security.gentoo.org/glsa/201903-03Third Party Advisory
- https://security.netapp.com/advisory/ntap-20190315-0001/PatchThird Party Advisory
- https://security.netapp.com/advisory/ntap-20190719-0004/Third Party Advisory
- https://support.f5.com/csp/article/K84141449Third Party Advisory
- https://support.f5.com/csp/article/K84141449?utm_source=f5support&%3Butm_medi
- https://usn.ubuntu.com/3882-1/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4386Third Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlPatchThird Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.htmlPatchThird Party Advisory
FAQ
What is CVE-2019-3822?
CVE-2019-3822 is a vulnerability with a CVSS score of 9.8 (CRITICAL). libcurl versions from 7.36.0 to before 7.64.0 are vulnerable to a stack-based buffer overflow. The function creating an outgoing NTLM type-3 header (`lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_messa...
How severe is CVE-2019-3822?
CVE-2019-3822 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2019-3822?
Check the references section above for vendor advisories and patch information. Affected products include: Haxx Libcurl, Canonical Ubuntu Linux, Debian Debian Linux, Netapp Active Iq Unified Manager, Netapp Clustered Data Ontap.