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CVE-2017-9461

Status Candidate

Overview

smbd in Samba before 4.4.10 and 4.5.x before 4.5.6 has a denial of service vulnerability (fd_open_atomic infinite loop with high CPU usage and memory consumption) due to wrongly handling dangling symlinks.

Related Files

Red Hat Security Advisory 2017-2778-01
Posted Sep 21, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2778-01 - Samba is an open-source implementation of the Server Message Block protocol and the related Common Internet File System protocol, which allow PC-compatible machines to share files, printers, and various information. Security Fix: A race condition was found in samba server. A malicious samba client could use this flaw to access files and directories in areas of the server file system not exported under the share definitions.

tags | advisory, protocol
systems | linux, redhat
advisories | CVE-2017-2619, CVE-2017-9461
MD5 | a2223c4fb9976c36e1cdf43e8720d475
Red Hat Security Advisory 2017-1950-01
Posted Aug 2, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-1950-01 - Samba is an open-source implementation of the Server Message Block protocol and the related Common Internet File System protocol, which allow PC-compatible machines to share files, printers, and various information. The following packages have been upgraded to a later upstream version: samba. Security Fix: A flaw was found in the way Samba handled dangling symlinks. An authenticated malicious Samba client could use this flaw to cause the smbd daemon to enter an infinite loop and use an excessive amount of CPU and memory.

tags | advisory, protocol
systems | linux, redhat
advisories | CVE-2017-9461
MD5 | e4e1f3c302f47d7da4ed5417d186123d
Red Hat Security Advisory 2017-2338-01
Posted Aug 1, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2338-01 - Samba is an open-source implementation of the Server Message Block protocol and the related Common Internet File System protocol, which allow PC-compatible machines to share files, printers, and various information. Security Fix: A race condition was found in samba server. A malicious samba client could use this flaw to access files and directories, in areas of the server file system not exported under the share definitions.

tags | advisory, protocol
systems | linux, redhat
advisories | CVE-2017-2619, CVE-2017-9461
MD5 | 853e2e532cca60d4465bb23c43857514
Ubuntu Security Notice USN-3348-1
Posted Jul 6, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3348-1 - It was discovered that Samba incorrectly handled dangling symlinks. A remote attacker could possibly use this issue to cause Samba to hang, resulting in a denial of service. This issue only applied to Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. In addition, this update fixes a regression introduced by USN-3267-1 that caused Samba to incorrectly handle non-wide symlinks to directories.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2017-9461
MD5 | 1a8e33061827bcdecdb8dac866c560a6
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