CVE-2013-4559

lighttpd before 1.4.33 does not check the return value of the (1) setuid, (2) setgid, or (3) setgroups functions, which might cause lighttpd to run as root if it is restarted and allows remote attackers to gain privileges, as demonstrated by multiple calls to the clone function that cause setuid to fail when the user process limit is reached.

• CWE-264

• http://download.lighttpd.net/lighttpd/security/lighttpd_sa_2013_02.txtVendor Advisory
• http://jvn.jp/en/jp/JVN37417423/index.htmlThird Party Advisory
• http://lists.opensuse.org/opensuse-updates/2014-01/msg00049.htmlMailing List, Third Party Advisory
• http://marc.info/?l=bugtraq&m=141576815022399&w=2Issue Tracking, Third Party Advisory
• http://secunia.com/advisories/55682Third Party Advisory
• http://www.openwall.com/lists/oss-security/2013/11/12/4Mailing List, Third Party Advisory
• https://kc.mcafee.com/corporate/index?page=content&id=SB10310Third Party Advisory
• https://www.debian.org/security/2013/dsa-2795Third Party Advisory
• http://download.lighttpd.net/lighttpd/security/lighttpd_sa_2013_02.txtVendor Advisory
• http://jvn.jp/en/jp/JVN37417423/index.htmlThird Party Advisory
• http://lists.opensuse.org/opensuse-updates/2014-01/msg00049.htmlMailing List, Third Party Advisory
• http://marc.info/?l=bugtraq&m=141576815022399&w=2Issue Tracking, Third Party Advisory
• http://secunia.com/advisories/55682Third Party Advisory
• http://www.openwall.com/lists/oss-security/2013/11/12/4Mailing List, Third Party Advisory
• https://kc.mcafee.com/corporate/index?page=content&id=SB10310Third Party Advisory
• https://www.debian.org/security/2013/dsa-2795Third Party Advisory

Published

Nov 20, 2013

Last Modified

Jun 16, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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