CVE-2019-19726
CVSS V2 High 7.2
CVSS V3 High 7.8
Description
OpenBSD through 6.6 allows local users to escalate to root because a check for LD_LIBRARY_PATH in setuid programs can be defeated by setting a very small RLIMIT_DATA resource limit. When executing chpass or passwd (which are setuid root), _dl_setup_env in ld.so tries to strip LD_LIBRARY_PATH from the environment, but fails when it cannot allocate memory. Thus, the attacker is able to execute their own library code as root.
Overview
- CVE ID
- CVE-2019-19726
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2019-12-12T01:15:10
- Last Modified Date
- 2023-01-30T20:00:55
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:* | 1 | OR | 6.6 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:C/I:C/A:C
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- COMPLETE
- Integrity Impact
- COMPLETE
- Availability Impact
- COMPLETE
- Base Score
- 7.2
- Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 10
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 7.8
- Base Severity
- HIGH
- Exploitability Score
- 1.8
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://www.openbsd.org/errata66.html | Patch Vendor Advisory |
| https://www.openwall.com/lists/oss-security/2019/12/11/9 | Mailing List Third Party Advisory |
| https://seclists.org/bugtraq/2019/Dec/25 | Exploit Mailing List Third Party Advisory |
| http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html | Exploit Third Party Advisory VDB Entry |
| http://seclists.org/fulldisclosure/2019/Dec/31 | Exploit Third Party Advisory |
| http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2019-19726 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19726 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 16:55:03 | Added to TrackCVE | |||
| 2022-12-04 07:42:47 | 2019-12-12T01:15Z | 2019-12-12T01:15:10 | CVE Published Date | updated |
| 2022-12-04 07:42:47 | 2019-12-27T23:15:13 | CVE Modified Date | updated | |
| 2022-12-04 07:42:47 | Undergoing Analysis | Vulnerability Status | updated | |
| 2023-01-30 21:08:58 | 2023-01-30T20:00:55 | CVE Modified Date | updated | |
| 2023-01-30 21:08:59 | Undergoing Analysis | Analyzed | Vulnerability Status | updated |