National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-3822 Detail

Current 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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 9.8 CRITICAL
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (V3.0 legend)
Impact Score: 5.9
Exploitability Score: 3.9


Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 7.5 HIGH
Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:P) (V2 legend)
Impact Subscore: 6.4
Exploitability Subscore: 10.0


Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): Partial
Availability (A): Partial
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.securityfocus.com/bid/106950 Third Party Advisory VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3822 Exploit Issue Tracking Patch Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-436177.pdf Third Party Advisory
https://curl.haxx.se/docs/CVE-2019-3822.html Patch Vendor Advisory
https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f@%3Cdevnull.infra.apache.org%3E Mailing List Third Party Advisory
https://security.gentoo.org/glsa/201903-03 Third Party Advisory
https://security.netapp.com/advisory/ntap-20190315-0001/ Patch Third Party Advisory
https://security.netapp.com/advisory/ntap-20190719-0004/
https://support.f5.com/csp/article/K84141449
https://usn.ubuntu.com/3882-1/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4386 Third Party Advisory
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html Patch Third Party Advisory
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html

Technical Details

Vulnerability Type (View All)

  • Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
7.36.0
Up to (excluding)
7.64.0

Configuration 2 ( hide )
 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 3 ( hide )
 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 4 ( hide )
 cpe:2.3:o:netapp:clustered_data_ontap:*:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 5 ( hide )
 cpe:2.3:a:siemens:sinema_remote_connect_client:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
2.0

Configuration 6 ( hide )
 cpe:2.3:a:oracle:communications_operations_monitor:3.4:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:oracle:communications_operations_monitor:4.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:oracle:secure_global_desktop:5.4:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

14 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-3822
NVD Published Date:
02/06/2019
NVD Last Modified:
07/19/2019