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CVE-2019-19726

Published: Dec 12, 2019

Modified: Aug 5, 2024

PUBLISHED

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.

Vendor	Product	Versions
n/a	n/a	affected `n/a`

References

https://www.openbsd.org/errata66.html

https://www.openwall.com/lists/oss-security/2019/12/11/9

20191212 Local Privilege Escalation in OpenBSD's dynamic loader (CVE-2019-19726)

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http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html

20191213 Local Privilege Escalation in OpenBSD's dynamic loader (CVE-2019-19726)

mailing-list

http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html

[oss-security] 20231003 CVE-2023-4911: Local Privilege Escalation in the glibc's ld.so

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20231005 CVE-2023-4911: Local Privilege Escalation in the glibc's ld.so

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http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html

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