CVE-2019-19726

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.

Weakness classification

• nvd@nist.gov: CWE-269

Primary references

• cve@mitre.org — Exploit, Third Party Advisory, VDB Entry
• cve@mitre.org — Third Party Advisory, VDB Entry
• cve@mitre.org
• cve@mitre.org — Exploit, Mailing List, Third Party Advisory
• cve@mitre.org
• cve@mitre.org
• cve@mitre.org — Exploit, Mailing List, Third Party Advisory
• cve@mitre.org — Patch, Vendor Advisory
• cve@mitre.org — Mailing List, Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory, VDB Entry
• af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, VDB Entry
• af854a3a-2127-422b-91ae-364da2661108