nsd

NSD The NLnet Labs Name Server Daemon NSD is an authoritative DNS name server. It has been developed for operations in environments where speed, reliability, stability and security are of high importance. If you have any feedback, we would love to hear from you. Don’t hesitate to create an issue ...

Astra Linux – Vulnerability in unbound

Unbound from NLnet Labs, including versions up to and including 1.12.0, and NSD from NLnet Labs, including versions up to and including 4.3.3, contain a local vulnerability that allows for a local symlink attack. When creating the PID file, Unbound and NSD either create the file if it does not...

CVE-2026-101339

A HIP resource record that fills the RDATA near or at is limit, and has another dname RDATA field a HIP Rendezvous server can overwrite the stack with up to 191 bytes of attacker controlled data. Zone files which are written out by NSD itself, such as for zones for which the NSD instance is...

CVE-2026-101341

Tokens of text in RDATA of for example TXT records under 32 bytes are not checked to stay within the space reserved for the RDATA allowing for arbitrary sized out of bound stack writes, including an overwrite of a callback function pointer which is called directly after parse. Zone files which ar...

CVE-2026-101337

When base64 data is split up in pieces, of 3 character or less, tokens were incorrectly calculated to produce 0 bytes. This enables attackers to overwrite the stack with up to 64K of attacker controlled data. Zone files which are written out by NSD itself, such as for zones for which the NSD...

CVE-2026-101338

When a SVCB or HTTPS RR has filled the wire format RDATA up to the brim, another ECH parameter may overwrite the stack, and once beyond the limit, the base64 decoder can write attacker controlled data of unlimited size. Zone files which are written out by NSD itself, such as for zones for which t...

UBUNTU-CVE-2026-101341

Tokens of text in RDATA of for example TXT records under 32 bytes are not checked to stay within the space reserved for the RDATA allowing for arbitrary sized out of bound stack writes, including an overwrite of a callback function pointer which is called directly after parse. Zone files which ar...

UBUNTU-CVE-2026-101338

When a SVCB or HTTPS RR has filled the wire format RDATA up to the brim, another ECH parameter may overwrite the stack, and once beyond the limit, the base64 decoder can write attacker controlled data of unlimited size. Zone files which are written out by NSD itself, such as for zones for which t...

UBUNTU-CVE-2026-101337

When base64 data is split up in pieces, of 3 character or less, tokens were incorrectly calculated to produce 0 bytes. This enables attackers to overwrite the stack with up to 64K of attacker controlled data. Zone files which are written out by NSD itself, such as for zones for which the NSD...

UBUNTU-CVE-2026-101339

A HIP resource record that fills the RDATA near or at is limit, and has another dname RDATA field a HIP Rendezvous server can overwrite the stack with up to 191 bytes of attacker controlled data. Zone files which are written out by NSD itself, such as for zones for which the NSD instance is...

CVE-2026-101339

A flaw was found in NSD. When parsing directly supplied zone files, a specially crafted Host Identity Protocol HIP resource record can cause a stack-based buffer overflow. An attacker capable of provisioning or feeding zone files into the server can exploit this vulnerability to execute arbitrary...

CVE-2026-101337

A flaw was found in NSD Name Server Daemon. When parsing DNS zone files containing base64-encoded data formatted in segments of three characters or fewer, NSD incorrectly calculates token sizes, resulting in a stack-based buffer overflow. An attacker who can supply or manipulate a zone file loade...

CVE-2026-101341

A flaw was found in NSD. When parsing directly supplied Domain Name System DNS zone files, NSD fails to properly validate the length of text tokens within resource record data. An attacker able to provide a specially crafted zone file can trigger a stack-based buffer overflow, potentially leading...

CVE-2026-101338

A flaw was found in NSD. When processing zone files containing specially formatted Service Binding SVCB or HTTPS resource records, the base64 decoding routine can exceed memory limits and cause a stack-based buffer overflow. An attacker capable of provisioning or supplying crafted zone files...

DEBIAN-CVE-2026-101339

A HIP resource record that fills the RDATA near or at is limit, and has another dname RDATA field a HIP Rendezvous server can overwrite the stack with up to 191 bytes of attacker controlled data. Zone files which are written out by NSD itself, such as for zones for which the NSD instance is...

CVE-2026-101339

A HIP resource record that fills the RDATA near or at is limit, and has another dname RDATA field a HIP Rendezvous server can overwrite the stack with up to 191 bytes of attacker controlled data. Zone files which are written out by NSD itself, such as for zones for which the NSD instance is...

DEBIAN-CVE-2026-101338

When a SVCB or HTTPS RR has filled the wire format RDATA up to the brim, another ECH parameter may overwrite the stack, and once beyond the limit, the base64 decoder can write attacker controlled data of unlimited size. Zone files which are written out by NSD itself, such as for zones for which t...

DEBIAN-CVE-2026-101341

Tokens of text in RDATA of for example TXT records under 32 bytes are not checked to stay within the space reserved for the RDATA allowing for arbitrary sized out of bound stack writes, including an overwrite of a callback function pointer which is called directly after parse. Zone files which ar...

CVE-2026-101341

Tokens of text in RDATA of for example TXT records under 32 bytes are not checked to stay within the space reserved for the RDATA allowing for arbitrary sized out of bound stack writes, including an overwrite of a callback function pointer which is called directly after parse. Zone files which ar...

CVE-2026-101338

When a SVCB or HTTPS RR has filled the wire format RDATA up to the brim, another ECH parameter may overwrite the stack, and once beyond the limit, the base64 decoder can write attacker controlled data of unlimited size. Zone files which are written out by NSD itself, such as for zones for which t...