Unbound Nlnetlabs Unbound

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By the Year

In 2021 there have been 12 vulnerabilities in Nlnetlabs Unbound with an average score of 8.7 out of ten. Last year Unbound had 3 security vulnerabilities published. That is, 9 more vulnerabilities have already been reported in 2021 as compared to last year. However, the average CVE base score of the vulnerabilities in 2021 is greater by 1.88.

Year Vulnerabilities Average Score
2021 12 8.71
2020 3 6.83
2019 2 7.40
2018 0 0.00

It may take a day or so for new Unbound vulnerabilities to show up in the stats or in the list of recent security vulnerabilties. Additionally vulnerabilities may be tagged under a different product or component name.

Recent Nlnetlabs Unbound Security Vulnerabilities

** DISPUTED ** Unbound before 1.9.5 allows an assertion failure via a compressed name in dname_pkt_copy

CVE-2019-25041 7.5 - High - April 27, 2021

** DISPUTED ** Unbound before 1.9.5 allows an assertion failure via a compressed name in dname_pkt_copy. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited.

assertion failure

** DISPUTED ** Unbound before 1.9.5 allows an out-of-bounds write via a compressed name in rdata_copy

CVE-2019-25042 9.8 - Critical - April 27, 2021

** DISPUTED ** Unbound before 1.9.5 allows an out-of-bounds write via a compressed name in rdata_copy. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited.

Memory Corruption

** DISPUTED ** Unbound before 1.9.5 allows an infinite loop via a compressed name in dname_pkt_copy

CVE-2019-25040 7.5 - High - April 27, 2021

** DISPUTED ** Unbound before 1.9.5 allows an infinite loop via a compressed name in dname_pkt_copy. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited.

Infinite Loop

** DISPUTED ** Unbound before 1.9.5 allows an integer overflow in the regional allocator via the ALIGN_UP macro

CVE-2019-25033 9.8 - Critical - April 27, 2021

** DISPUTED ** Unbound before 1.9.5 allows an integer overflow in the regional allocator via the ALIGN_UP macro. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited.

Integer Overflow or Wraparound

** DISPUTED ** Unbound before 1.9.5 allows an integer overflow in a size calculation in dnscrypt/dnscrypt.c

CVE-2019-25038 9.8 - Critical - April 27, 2021

** DISPUTED ** Unbound before 1.9.5 allows an integer overflow in a size calculation in dnscrypt/dnscrypt.c. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited.

Integer Overflow or Wraparound

** DISPUTED ** Unbound before 1.9.5 allows an assertion failure and denial of service in dname_pkt_copy via an invalid packet

CVE-2019-25037 7.5 - High - April 27, 2021

** DISPUTED ** Unbound before 1.9.5 allows an assertion failure and denial of service in dname_pkt_copy via an invalid packet. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited.

assertion failure

** DISPUTED ** Unbound before 1.9.5 allows an assertion failure and denial of service in synth_cname

CVE-2019-25036 7.5 - High - April 27, 2021

** DISPUTED ** Unbound before 1.9.5 allows an assertion failure and denial of service in synth_cname. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited.

assertion failure

** DISPUTED ** Unbound before 1.9.5 allows an out-of-bounds write in sldns_bget_token_par

CVE-2019-25035 9.8 - Critical - April 27, 2021

** DISPUTED ** Unbound before 1.9.5 allows an out-of-bounds write in sldns_bget_token_par. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited.

Memory Corruption

** DISPUTED ** Unbound before 1.9.5

CVE-2019-25031 5.9 - Medium - April 27, 2021

** DISPUTED ** Unbound before 1.9.5 allows configuration injection in create_unbound_ad_servers.sh upon a successful man-in-the-middle attack against a cleartext HTTP session. NOTE: The vendor does not consider this a vulnerability of the Unbound software. create_unbound_ad_servers.sh is a contributed script from the community that facilitates automatic configuration creation. It is not part of the Unbound installation.

Injection

** DISPUTED ** Unbound before 1.9.5 allows an integer overflow in a size calculation in respip/respip.c

CVE-2019-25039 9.8 - Critical - April 27, 2021

** DISPUTED ** Unbound before 1.9.5 allows an integer overflow in a size calculation in respip/respip.c. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited.

Integer Overflow or Wraparound

** DISPUTED ** Unbound before 1.9.5 allows an integer overflow in sldns_str2wire_dname_buf_origin, leading to an out-of-bounds write

CVE-2019-25034 9.8 - Critical - April 27, 2021

** DISPUTED ** Unbound before 1.9.5 allows an integer overflow in sldns_str2wire_dname_buf_origin, leading to an out-of-bounds write. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited.

Integer Overflow or Wraparound

** DISPUTED ** Unbound before 1.9.5 allows an integer overflow in the regional allocator via regional_alloc

CVE-2019-25032 9.8 - Critical - April 27, 2021

** DISPUTED ** Unbound before 1.9.5 allows an integer overflow in the regional allocator via regional_alloc. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited.

Integer Overflow or Wraparound

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

CVE-2020-28935 5.5 - Medium - December 07, 2020

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.

insecure temporary file

Unbound before 1.10.1 has an infinite loop

CVE-2020-12663 7.5 - High - May 19, 2020

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

Infinite Loop

Unbound before 1.10.1 has Insufficient Control of Network Message Volume, aka an "NXNSAttack" issue

CVE-2020-12662 7.5 - High - May 19, 2020

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.

Stack Exhaustion

Unbound 1.6.4 through 1.9.4 contain a vulnerability in the ipsec module

CVE-2019-18934 7.3 - High - November 19, 2019

Unbound 1.6.4 through 1.9.4 contain a vulnerability in the ipsec module that can cause shell code execution after receiving a specially crafted answer. This issue can only be triggered if unbound was compiled with `--enable-ipsecmod` support, and ipsecmod is enabled and used in the configuration.

Improper Input Validation

Unbound before 1.9.4 accesses uninitialized memory, which allows remote attackers to trigger a crash via a crafted NOTIFY query

CVE-2019-16866 7.5 - High - October 03, 2019

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.

Improper Handling of Exceptional Conditions

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