CVE-2006-5556

HP-UX B.11.11 - Buffer Overflow via Long TZ Environment Variable

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2006-5556. PoCs published by prdelka.

AI-analyzed exploit summary This exploit targets a stack overflow in HP-UX libc's handling of the TZ environment variable. It uses the 'su' binary to escalate privileges to root by overflowing the buffer with a crafted payload containing shellcode.

Description

Buffer overflow in the localtime_r function, and certain other functions, in libc in HP-UX B.11.11 and possibly other versions allows local users to execute arbitrary code via a long TZ environment variable.

Exploits (1)

exploitdb WORKING POC VERIFIED
by prdelka · clocalhp-ux
https://www.exploit-db.com/exploits/2636

This exploit targets a stack overflow in HP-UX libc's handling of the TZ environment variable. It uses the 'su' binary to escalate privileges to root by overflowing the buffer with a crafted payload containing shellcode.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: HP-UX libc (B.11.11 and possibly others)
No auth needed
Prerequisites: Access to a vulnerable HP-UX system · Ability to execute the compiled exploit binary
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/2636
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/29777
Exploit, Patch vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/20718

Scores

EPSS 0.0124
EPSS Percentile 65.3%

Details

Status published
Products (3)
hp/hp-ux 11.00
hp/hp-ux 11.4
hp/hp-ux 11.11
Published Oct 27, 2006
Tracked Since Feb 18, 2026