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CVE-2018-16851

Status Candidate

Overview

Samba from version 4.0.0 and before versions 4.7.12, 4.8.7, 4.9.3 is vulnerable to a denial of service. During the processing of an LDAP search before Samba's AD DC returns the LDAP entries to the client, the entries are cached in a single memory object with a maximum size of 256MB. When this size is reached, the Samba process providing the LDAP service will follow the NULL pointer, terminating the process. There is no further vulnerability associated with this issue, merely a denial of service.

Related Files

Gentoo Linux Security Advisory 202003-52
Posted Mar 26, 2020
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202003-52 - Multiple vulnerabilities have been found in Samba, the worst of which could lead to remote code execution. Versions less than 4.11.6 are affected.

tags | advisory, remote, vulnerability, code execution
systems | linux, gentoo
advisories | CVE-2018-10858, CVE-2018-10918, CVE-2018-10919, CVE-2018-1139, CVE-2018-1140, CVE-2018-14629, CVE-2018-16841, CVE-2018-16851, CVE-2018-16852, CVE-2018-16853, CVE-2018-16857, CVE-2018-16860, CVE-2019-10197, CVE-2019-14861, CVE-2019-14870, CVE-2019-14902, CVE-2019-14907, CVE-2019-19344
SHA-256 | 78ecd3bc02b0f10129021084736ee7cc0c9408898c589745d90193370efe75aa
Slackware Security Advisory - samba Updates
Posted Nov 30, 2018
Authored by Slackware Security Team | Site slackware.com

Slackware Security Advisory - New samba packages are available for Slackware 14.0, 14.1, 14.2, and -current to fix security issues.

tags | advisory
systems | linux, slackware
advisories | CVE-2018-14629, CVE-2018-16841, CVE-2018-16851, CVE-2018-16852, CVE-2018-16853, CVE-2018-16857
SHA-256 | 671fbca86bbc5a91ba38e250555985ef427c47025b7d59bbb3bd26f4e94c089c
Debian Security Advisory 4345-1
Posted Nov 28, 2018
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4345-1 - Several vulnerabilities have been discovered in Samba, a SMB/CIFS file, print, and login server for Unix.

tags | advisory, vulnerability
systems | linux, unix, debian
advisories | CVE-2018-14629, CVE-2018-16841, CVE-2018-16851
SHA-256 | 8e8662ce6c65cf8afbe1105d2a8bdc36b597add5ac00992a1699de767fa80143
Ubuntu Security Notice USN-3827-2
Posted Nov 28, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3827-2 - USN-3827-1 fixed a vulnerability in samba. This update provides the corresponding update for Ubuntu 12.04 ESM. Florian Stuelpner discovered that Samba incorrectly handled CNAME records. A remote attacker could use this issue to cause Samba to crash, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2018-14629, CVE-2018-16841, CVE-2018-16851
SHA-256 | 7db0d77361d81832ac500d6926d20bd91a314d5e196908f013fdb41d3ea16986
Ubuntu Security Notice USN-3827-1
Posted Nov 27, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3827-1 - Florian Stuelpner discovered that Samba incorrectly handled CNAME records. A remote attacker could use this issue to cause Samba to crash, resulting in a denial of service. Alex MacCuish discovered that Samba incorrectly handled memory when configured to accept smart-card authentication. A remote attacker could possibly use this issue to cause Samba to crash, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2018-14629, CVE-2018-16841, CVE-2018-16851
SHA-256 | 52eab17c24ac653301862d040a9c6d4c27fd54410da5479f5553da89f86b72d3
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