CVE-2019-19726
OpenBSD setuid local privilege escalation vulnerability
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.
INFO
Published Date :
Dec. 12, 2019, 1:15 a.m.
Last Modified :
Oct. 6, 2023, 5:15 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
Public PoC/Exploit Available at Github
CVE-2019-19726 has a 4 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2019-19726.
| URL | Resource |
|---|---|
| http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html | Exploit Third Party Advisory VDB Entry |
| http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html | Third Party Advisory VDB Entry |
| http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html | |
| http://seclists.org/fulldisclosure/2019/Dec/31 | Exploit Mailing List Third Party Advisory |
| http://seclists.org/fulldisclosure/2023/Oct/11 | |
| http://www.openwall.com/lists/oss-security/2023/10/03/2 | |
| https://seclists.org/bugtraq/2019/Dec/25 | Exploit Mailing List Third Party Advisory |
| 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
DC-1 is a purposely built vulnerable lab for the purpose of gaining experience in the world of penetration testing. It was designed to be a challenge for beginners, but just how easy it is will depend on your skills and knowledge, and your ability to learn.
2019年天融信阿尔法实验室在微信公众号发布的所有安全资讯汇总
Localroot Compile
C Shell Python
Various local exploits
linux local exploit root local-exploits
Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2019-19726 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2019-19726 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Oct. 06, 2023
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html [No Types Assigned] -
CVE Modified by [email protected]
Oct. 06, 2023
Action Type Old Value New Value Added Reference http://seclists.org/fulldisclosure/2023/Oct/11 [No Types Assigned] -
CVE Modified by [email protected]
Oct. 03, 2023
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2023/10/03/2 [No Types Assigned] -
Modified Analysis by [email protected]
Jan. 30, 2023
Action Type Old Value New Value Changed Reference Type http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html No Types Assigned http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html Third Party Advisory, VDB Entry Changed Reference Type http://seclists.org/fulldisclosure/2019/Dec/31 Exploit, Third Party Advisory http://seclists.org/fulldisclosure/2019/Dec/31 Exploit, Mailing List, Third Party Advisory -
CVE Modified by [email protected]
Dec. 27, 2019
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html [No Types Assigned] -
Initial Analysis by [email protected]
Dec. 16, 2019
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Reference Type http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html No Types Assigned http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html Exploit, Third Party Advisory, VDB Entry Changed Reference Type http://seclists.org/fulldisclosure/2019/Dec/31 No Types Assigned http://seclists.org/fulldisclosure/2019/Dec/31 Exploit, Third Party Advisory Changed Reference Type https://seclists.org/bugtraq/2019/Dec/25 No Types Assigned https://seclists.org/bugtraq/2019/Dec/25 Exploit, Mailing List, Third Party Advisory Changed Reference Type https://www.openbsd.org/errata66.html No Types Assigned https://www.openbsd.org/errata66.html Patch, Vendor Advisory Changed Reference Type https://www.openwall.com/lists/oss-security/2019/12/11/9 No Types Assigned https://www.openwall.com/lists/oss-security/2019/12/11/9 Mailing List, Third Party Advisory Added CWE NIST CWE-269 Added CPE Configuration OR *cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:* versions up to (including) 6.6 -
CVE Modified by [email protected]
Dec. 13, 2019
Action Type Old Value New Value Added Reference http://seclists.org/fulldisclosure/2019/Dec/31 [No Types Assigned] -
CVE Modified by [email protected]
Dec. 12, 2019
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html [No Types Assigned] -
CVE Modified by [email protected]
Dec. 12, 2019
Action Type Old Value New Value Added Reference https://seclists.org/bugtraq/2019/Dec/25 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2019-19726 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2019-19726
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.06 }} 0.00%
score
0.21523
percentile