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  • Results Type: Overview
  • Keyword (text search): cpe:2.3:a:nlnetlabs:unbound:1.1.1:*:*:*:*:*:*:*
There are 10 matching records.
Displaying matches 1 through 10.
Vuln ID Summary CVSS Severity
CVE-2020-28935

NLnet Labs Unbound, up to and including version 1.12.0, and NLnet Labs NSD, up to and including version 4.3.3, contain a local vulnerability that would allow for a local symlink attack. When writing the PID file, Unbound and NSD create the file if it is not there, or open an existing file for writing. In case the file was already present, they would follow symlinks if the file happened to be a symlink instead of a regular file. An additional chown of the file would then take place after it was written, making the user Unbound/NSD is supposed to run as the new owner of the file. If an attacker has local access to the user Unbound/NSD runs as, she could create a symlink in place of the PID file pointing to a file that she would like to erase. If then Unbound/NSD is killed and the PID file is not cleared, upon restarting with root privileges, Unbound/NSD will rewrite any file pointed at by the symlink. This is a local vulnerability that could create a Denial of Service of the system Unbound/NSD is running on. It requires an attacker having access to the limited permission user Unbound/NSD runs as and point through the symlink to a critical file on the system.

Published: December 07, 2020; 5:15:20 PM -0500
V3.1: 5.5 MEDIUM
V2.0: 2.1 LOW
CVE-2020-12663

Unbound before 1.10.1 has an infinite loop via malformed DNS answers received from upstream servers.

Published: May 19, 2020; 10:15:11 AM -0400
V3.1: 7.5 HIGH
V2.0: 5.0 MEDIUM
CVE-2020-12662

Unbound before 1.10.1 has Insufficient Control of Network Message Volume, aka an "NXNSAttack" issue. This is triggered by random subdomains in the NSDNAME in NS records.

Published: May 19, 2020; 10:15:11 AM -0400
V3.1: 7.5 HIGH
V2.0: 5.0 MEDIUM
CVE-2019-16866

Unbound before 1.9.4 accesses uninitialized memory, which allows remote attackers to trigger a crash via a crafted NOTIFY query. The source IP address of the query must match an access-control rule.

Published: October 03, 2019; 3:15:09 PM -0400
V3.1: 7.5 HIGH
V2.0: 5.0 MEDIUM
CVE-2017-15105

A flaw was found in the way unbound before 1.6.8 validated wildcard-synthesized NSEC records. An improperly validated wildcard NSEC record could be used to prove the non-existence (NXDOMAIN answer) of an existing wildcard record, or trick unbound into accepting a NODATA proof.

Published: January 23, 2018; 11:29:00 AM -0500
V3.0: 5.3 MEDIUM
V2.0: 5.0 MEDIUM
CVE-2014-8602

iterator.c in NLnet Labs Unbound before 1.5.1 does not limit delegation chaining, which allows remote attackers to cause a denial of service (memory and CPU consumption) via a large or infinite number of referrals.

Published: December 10, 2014; 9:59:03 PM -0500
V3.x:(not available)
V2.0: 4.3 MEDIUM
CVE-2009-4008

Unbound before 1.4.4 does not send responses for signed zones after mishandling an unspecified query, which allows remote attackers to cause a denial of service (DNSSEC outage) via a crafted query.

Published: June 02, 2011; 4:55:01 PM -0400
V3.x:(not available)
V2.0: 5.0 MEDIUM
CVE-2011-1922

daemon/worker.c in Unbound 1.x before 1.4.10, when debugging functionality and the interface-automatic option are enabled, allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a crafted DNS request that triggers improper error handling.

Published: May 31, 2011; 4:55:03 PM -0400
V3.x:(not available)
V2.0: 4.3 MEDIUM
CVE-2010-0969

Unbound before 1.4.3 does not properly align structures on 64-bit platforms, which allows remote attackers to cause a denial of service (daemon crash) via unspecified vectors.

Published: March 16, 2010; 3:00:00 PM -0400
V3.x:(not available)
V2.0: 5.0 MEDIUM
CVE-2009-3602

Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote attackers to cause secure delegations to be downgraded via DNS spoofing or other DNS-related attacks in conjunction with crafted delegation responses.

Published: October 13, 2009; 6:30:00 AM -0400
V3.x:(not available)
V2.0: 7.5 HIGH