Stack-address disclosure via ber_printf type confusion
Published Jun 9, 2026 · Updated Jun 9, 2026
Type confusion in 389 Directory Server allows remote authenticated users to read partial stack addresses through LDAP responses. The extop_handle_ldapssotoken_request() handler passes the address of its stack-local rc variable to ber_printf() with the integer format, encoding the pointer's low 32 bits in each SSO token response. Any authenticated non-administrator account can reach the default-enabled feature; the disclosure reduces stack ASLR entropy but does not provide a full bypass.
Summary
What happened
Type confusion in 389 Directory Server allows remote authenticated users to read partial stack addresses through LDAP responses. The extop_handle_ldapssotoken_request() handler passes the address of its stack-local rc variable to ber_printf() with the integer format, encoding the pointer's low 32 bits in each SSO token response. Any authenticated non-administrator account can reach the default-enabled feature; the disclosure reduces stack ASLR entropy but does not provide a full bypass.
The record
- CVE
- CVE-2026-11785
- Published
- Jun 9, 2026
- Updated
- Jun 9, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Directory Server
- Classifications
- CWE-843
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 9, 2026CVE publishedPublication date reported by the CVE source.
- Jun 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
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Published CVSS scores
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Attacks
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Technologies
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