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CVE-2021-20277

Status Candidate

Overview

A flaw was found in Samba's libldb. Multiple, consecutive leading spaces in an LDAP attribute can lead to an out-of-bounds memory write, leading to a crash of the LDAP server process handling the request. The highest threat from this vulnerability is to system availability.

Related Files

Red Hat Security Advisory 2021-2786-01
Posted Jul 21, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2786-01 - The libldb packages provide an extensible library that implements an LDAP-like API to access remote LDAP servers, or use local TDB databases. Issues addressed include an out of bounds read vulnerability.

tags | advisory, remote, local
systems | linux, redhat
advisories | CVE-2021-20277
SHA-256 | f268e25fce643231cb735cf3786ad5ec170dd2a9e4254f178dc95bdc8351d210
Red Hat Security Advisory 2021-2331-01
Posted Jun 9, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2331-01 - The libldb packages provide an extensible library that implements an LDAP-like API to access remote LDAP servers, or use local TDB databases. Issues addressed include an out of bounds read vulnerability.

tags | advisory, remote, local
systems | linux, redhat
advisories | CVE-2021-20277
SHA-256 | 6b8090e78b9966efe51af9d06a10bdc90aebd104d9d0e7b5f3337e83f49d61aa
Gentoo Linux Security Advisory 202105-22
Posted May 26, 2021
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202105-22 - Multiple vulnerabilities have been found in Samba, the worst of which could result in a Denial of Service condition. Versions less than 4.13.8 are affected.

tags | advisory, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2020-27840, CVE-2021-20254, CVE-2021-20277
SHA-256 | 0831b6708fb872da47dfe0075f1e8d4ebdf71acfdd0c8cbae9a8db3bbffe666d
Red Hat Security Advisory 2021-1213-01
Posted Apr 15, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1213-01 - The libldb packages provide an extensible library that implements an LDAP-like API to access remote LDAP servers, or use local TDB databases. Issues addressed include an out of bounds read vulnerability.

tags | advisory, remote, local
systems | linux, redhat
advisories | CVE-2021-20277
SHA-256 | 284ff076eab057d3e4bac9fa40530e3047879e2080a548821f6bfdc381353930
Red Hat Security Advisory 2021-1214-01
Posted Apr 15, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1214-01 - The libldb packages provide an extensible library that implements an LDAP-like API to access remote LDAP servers, or use local TDB databases. Issues addressed include an out of bounds read vulnerability.

tags | advisory, remote, local
systems | linux, redhat
advisories | CVE-2021-20277
SHA-256 | 0e0621b3f308786d9649dfae3f567c97cfba95f2ee28620e9b89b63f499ba287
Red Hat Security Advisory 2021-1197-01
Posted Apr 14, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1197-01 - The libldb packages provide an extensible library that implements an LDAP-like API to access remote LDAP servers, or use local TDB databases. Issues addressed include an out of bounds read vulnerability.

tags | advisory, remote, local
systems | linux, redhat
advisories | CVE-2021-20277
SHA-256 | 7e635439f9063bb6410c061409cd77a0be43c5d5eb27cef4c65a641868d49d21
Red Hat Security Advisory 2021-1072-01
Posted Apr 6, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1072-01 - The libldb packages provide an extensible library that implements an LDAP-like API to access remote LDAP servers, or use local TDB databases. Issues addressed include an out of bounds read vulnerability.

tags | advisory, remote, local
systems | linux, redhat
advisories | CVE-2021-20277
SHA-256 | 5978dcc37c36dca4400a5b55238b2fd7d5a777dca1dde1a0f2b24fb7c21af616
Ubuntu Security Notice USN-4888-2
Posted Mar 26, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4888-2 - USN-4888-1 fixed several vulnerabilities in ldb. This update provides the corresponding update for Ubuntu 14.04 ESM. Douglas Bagnall discovered that ldb, when used with Samba, incorrectly handled certain LDAP attributes. A remote attacker could possibly use this issue to cause the LDAP server to crash, resulting in a denial of service. Douglas Bagnall discovered that ldb, when used with Samba, incorrectly handled certain DN strings. A remote attacker could use this issue to cause the LDAP server to crash, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-27840, CVE-2021-20277
SHA-256 | 1f9ebcf4a58058d14bd496752ae31e54fdd7fc5b208273328e23dc9dde43d308
Ubuntu Security Notice USN-4888-1
Posted Mar 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4888-1 - Douglas Bagnall discovered that ldb, when used with Samba, incorrectly handled certain LDAP attributes. A remote attacker could possibly use this issue to cause the LDAP server to crash, resulting in a denial of service. Douglas Bagnall discovered that ldb, when used with Samba, incorrectly handled certain DN strings. A remote attacker could use this issue to cause the LDAP server to crash, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2020-27840, CVE-2021-20277
SHA-256 | 546850352f9f20cc004c3cc1ad61cf5b2e6f883387eba7f8b259cb8c44df3503
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