Incomplete blacklist vulnerability in sudo 1.6.8 and earlier allows local users to gain privileges via the (1) SHELLOPTS and (2) PS4 environment variables before executing a bash script on behalf of another user, which are not cleared even though other variables are.

References

• https://nvd.nist.gov/vuln/detail/CVE-2005-2959
• http://docs.info.apple.com/article.html?artnum=305214
• http://lists.apple.com/archives/security-announce/2007/Mar/msg00002.html
• http://secunia.com/advisories/17318
• http://secunia.com/advisories/17322
• http://secunia.com/advisories/17345
• http://secunia.com/advisories/17390
• http://secunia.com/advisories/17666
• http://secunia.com/advisories/18549
• http://secunia.com/advisories/24479
• http://www.debian.org/security/2005/dsa-870
• http://www.mandriva.com/security/advisories?name=MDKSA-2005:201
• http://www.novell.com/linux/security/advisories/2006_02_sr.html
• http://www.openpkg.org/security/OpenPKG-SA-2006.002-sudo.html
• http://www.securityfocus.com/advisories/9643
• http://www.securityfocus.com/bid/15191
• http://www.sudo.ws/bugs/show_bug.cgi?id=182
• http://www.us-cert.gov/cas/techalerts/TA07-072A.html
• http://www.vupen.com/english/advisories/2007/0930
• https://usn.ubuntu.com/213-1