CVE-2019-19726
HIGH
7,8
Source: [email protected]
Attack Vector: local
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
HIGH
7,2
Source: [email protected]
Access Vector: local
Access Complexity: low
Authentication: none
Confidentiality: complete
Integrity: complete
Availability: complete
Description
AI Translation Available
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.
EPSS (Exploit Prediction Scoring System)
Trend Analysis
EPSS (Exploit Prediction Scoring System)
Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.
EPSS Score
0,0820
Percentile
0,9th
Updated
EPSS Score Trend (Last 90 Days)
269
Improper Privilege Management
DraftCommon Consequences
Security Scopes Affected:
Access Control
Potential Impacts:
Gain Privileges Or Assume Identity
Applicable Platforms
All platforms may be affected
Exploit
OpenBSD 6.x - Dynamic Loader Privilege Escalation
Verified LocalOpenBSD 6.x - Dynamic Loader Privilege Escalation
View Exploit Code →
Exploit
OpenBSD - Dynamic Loader chpass Privilege Escalation (Metasploit)
Verified LocalOpenBSD - Dynamic Loader chpass Privilege Escalation (Metasploit)
View Exploit Code →
Operating System
Openbsd by Openbsd
Version Range Affected
To
6.6
(inclusive)
CPE Identifier
View Detailed Analysis
cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dy…
http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privi…
http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalat…
http://seclists.org/fulldisclosure/2019/Dec/31
http://seclists.org/fulldisclosure/2023/Oct/11
https://seclists.org/bugtraq/2019/Dec/25
https://www.openbsd.org/errata66.html
https://www.openwall.com/lists/oss-security/2019/12/11/9
http://www.openwall.com/lists/oss-security/2023/10/03/2
http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dy…
http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privi…
http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalat…
http://seclists.org/fulldisclosure/2019/Dec/31
http://seclists.org/fulldisclosure/2023/Oct/11
https://seclists.org/bugtraq/2019/Dec/25
https://www.openbsd.org/errata66.html
https://www.openwall.com/lists/oss-security/2019/12/11/9
http://www.openwall.com/lists/oss-security/2023/10/03/2