CVE-2020-8517

An issue was discovered in Squid before 4.10. Due to incorrect input validation, the NTLM authentication credentials parser in ext_lm_group_acl may write to memory outside the credentials buffer. On systems with memory access protections, this can result in the helper process being terminated unexpectedly. This leads to the Squid process also terminating and a denial of service for all clients using the proxy.

• CWE-20
• CWE-787

• http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00012.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00010.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.htmlMailing List, Third Party Advisory
• http://www.squid-cache.org/Advisories/SQUID-2020_3.txtVendor Advisory
• http://www.squid-cache.org/Versions/v4/changesets/squid-4-6982f1187a26557e582172965e266f544ea562a5.patchPatch, Vendor Advisory
• https://security.gentoo.org/glsa/202003-34Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210304-0002/Third Party Advisory
• https://usn.ubuntu.com/4289-1/Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00012.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00010.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.htmlMailing List, Third Party Advisory
• http://www.squid-cache.org/Advisories/SQUID-2020_3.txtVendor Advisory
• http://www.squid-cache.org/Versions/v4/changesets/squid-4-6982f1187a26557e582172965e266f544ea562a5.patchPatch, Vendor Advisory
• https://security.gentoo.org/glsa/202003-34Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210304-0002/Third Party Advisory
• https://usn.ubuntu.com/4289-1/Third Party Advisory

Published

Feb 4, 2020

Last Modified

Jun 17, 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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