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CVE-2025-8671

Medium priority

Some fixes available 2 of 24

A mismatch caused by client-triggered server-sent stream resets between HTTP/2 specifications and the internal architectures of some HTTP/2 implementations may result in excessive server resource consumption leading to...

5 affected packages

dnsdist, h2o, haproxy, lighttpd, varnish

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dnsdist Not affected Fixed Not affected Not affected Not affected
h2o Not in release Needs evaluation Needs evaluation Needs evaluation Needs evaluation
haproxy Not affected Not affected Not affected Not affected Not affected
lighttpd Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
varnish Not affected Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2025-30193

Medium priority

Some fixes available 2 of 4

In some circumstances, when DNSdist is configured to allow an unlimited number of queries on a single, incoming TCP connection from a client, an attacker can cause a denial of service by crafting a TCP exchange that triggers an...

1 affected package

dnsdist

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dnsdist Not affected Fixed Fixed Not affected Not affected
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CVE-2025-30194

Medium priority
Ignored

When DNSdist is configured to provide DoH via the nghttp2 provider, an attacker can cause a denial of service by crafting a DoH exchange that triggers an illegal memory access (double-free) and crash of DNSdist, causing a denial...

1 affected package

dnsdist

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dnsdist Not affected Not affected Not affected Not affected
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CVE-2024-25581

Medium priority
Not affected

When incoming DNS over HTTPS support is enabled using the nghttp2 provider, and queries are routed to a tcp-only or DNS over TLS backend, an attacker can trigger an assertion failure in DNSdist by sending a request for a...

1 affected package

dnsdist

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dnsdist Not affected Not affected Not affected Not affected
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CVE-2023-44487

High priority

Some fixes available 33 of 46

The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.

14 affected packages

dnsdist, dotnet6, dotnet7, dotnet8, h2o...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dnsdist Not affected Not affected Fixed Not affected Not affected
dotnet6 Not in release Not in release Fixed Not in release Not in release
dotnet7 Not in release Not in release Fixed Not in release Not in release
dotnet8 Not in release Fixed Not affected Not in release Not in release
h2o Not in release Not affected Fixed Fixed Fixed
haproxy Not affected Not affected Not affected Not affected Fixed
netty Not affected Not affected Fixed Fixed Not affected
nghttp2 Not affected Not affected Fixed Fixed Fixed
nginx Not affected Not affected Not affected Not affected Not affected
nodejs Not affected Not affected Fixed Fixed Fixed
tomcat10 Not affected Not affected Not in release Not in release Ignored
tomcat8 Not in release Not in release Not in release Not in release Fixed
tomcat9 Not affected Not affected Fixed Fixed Fixed
trafficserver Not in release Not affected Fixed Fixed Not affected
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CVE-2012-2979

Medium priority
Ignored

FreeBSD NSD before 3.2.13 allows remote attackers to crash a NSD child server process (SIGSEGV) and cause a denial of service in the NSD server.

2 affected packages

nsd, nsd3

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
nsd
nsd3
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CVE-2019-13952

Low priority
Vulnerable

The set_ipv6() function in zscan_rfc1035.rl in gdnsd before 2.4.3 and 3.x before 3.2.1 has a stack-based buffer overflow via a long and malformed IPv6 address in zone data.

1 affected package

gdnsd

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
gdnsd Not affected Not affected Not in release Vulnerable Vulnerable
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CVE-2019-13951

Low priority
Not affected

The set_ipv4() function in zscan_rfc1035.rl in gdnsd 3.x before 3.2.1 has a stack-based buffer overflow via a long and malformed IPv4 address in zone data.

1 affected package

gdnsd

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
gdnsd Not affected
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CVE-2019-13207

Medium priority
Vulnerable

nsd-checkzone in NLnet Labs NSD 4.2.0 has a Stack-based Buffer Overflow in the dname_concatenate() function in dname.c.

1 affected package

nsd

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
nsd Vulnerable Vulnerable Vulnerable Vulnerable Vulnerable
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CVE-2018-14663

Medium priority
Vulnerable

An issue has been found in PowerDNS DNSDist before 1.3.3 allowing a remote attacker to craft a DNS query with trailing data such that the addition of a record by dnsdist, for example an OPT record when adding EDNS Client Subnet,...

1 affected package

dnsdist

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dnsdist Not affected Not affected Not affected Not affected Vulnerable
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