net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME

A flaw was found in the net package of Go golang, specifically when using the LookupCNAME function with the cgo DNS resolver. A remote attacker could exploit this by providing a very long Canonical Name CNAME response. This can trigger a double-free of C memory, leading to a crash and a Denial of...

c-ares: c-ares: Use-after-free / double-free in query-completion handling

A flaw was found in c-ares. A use-after-free / double-free vulnerability exists in the query-completion handling path, where a query callback is invoked while the query is still linked in internal lookup structures. A remote attacker can exploit this via aresgetaddrinfo over TCP by sending crafte...

CVE-2025-15661 libssh2 - Heap Buffer Over-read via sftp_symlink() in sftp.c

libssh2 through 1.11.1, fixed in commit 2dae302, contains an out-of-bounds heap read vulnerability in the sftpsymlink function in src/sftp.c that allows a malicious SSH server or man-in-the-middle attacker to disclose heap memory contents or cause a crash by sending a crafted SSHFXPNAME response...

CVE-2026-45674

A flaw was found in Netty's DnsResolveContext. This vulnerability allows a remote attacker to achieve information disclosure or data manipulation by crafting malicious DNS responses. The flaw occurs because the DnsResolveContext fails to validate the origin bailiwick of CNAME records in DNS...

BIT-NGINX-GATEWAY-2026-28753 NGINX ngx_mail_proxy_module vulnerability

NGINX Plus and NGINX Open Source have a vulnerability in the ngxmailsmtpmodule module due to the improper handling of CRLF sequences in DNS responses. This allows an attacker-controlled DNS server to inject arbitrary headers into SMTP upstream requests, leading to potential request manipulation...

K000160367: NGINX ngx_mail_smtp_module vulnerability CVE-2026-28753

Security Advisory Description NGINX Plus and NGINX Open Source have a vulnerability in the ngxmailsmtpmodule module due to the improper handling of CRLF sequences in DNS responses. This allows an attacker-controlled DNS server to inject arbitrary headers into SMTP upstream requests, leading to...

EulerOS 2.0 SP11 : avahi (EulerOS-SA-2025-2473)

According to the versions of the avahi package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : A flaw was found in Avahi-daemon, which relies on fixed source ports for wide-area DNS queries. This issue simplifies attacks where malicious DNS...

bind: Cache poisoning attacks with unsolicited RRs

A vulnerability exists in BIND’s DNS resolver logic that makes it overly permissive when accepting resource records RRs in responses. Under certain conditions, this flaw allows attackers to inject unsolicited or forged DNS records into the cache. This can be exploited to poison the resolver cache...

c-ares: c-ares has a use-after-free in read_answers()

A flaw was found in c-ares. This vulnerability allows a remote or local attacker to cause a use-after-free, potentially leading to application-level denial of service or other unexpected behavior via manipulation of DNS responses or network conditions during query processing...

SUSE CVE-2023-4527

A flaw was found in glibc. When the getaddrinfo function is called with the AFUNSPEC address family and the system is configured with no-aaaa mode via /etc/resolv.conf, a DNS response via TCP larger than 2048 bytes can potentially disclose stack contents through the function returned address data...

glibc buffer error vulnerability

glibc GNU C Library is the C standard library implemented by the GNU Project. A security vulnerability exists in glibc, which stems from the fact that when the getaddrinfo function is called using the AFUNSPEC address family and is configured in no-aaaa mode via /etc/resolv.conf, TCP DNS response...

SUSE CVE-2009-2426

The connectionedgeprocessrelaycellnotopen function in src/or/relay.c in Tor 0.2.x before 0.2.0.35 and 0.1.x before 0.1.2.8-beta allows exit relays to have an unspecified impact by causing controllers to accept DNS responses that redirect to an internal IP address via unknown vectors. NOTE: some o...

CVE-2021-1975

Possible heap overflow due to improper length check of domain while parsing the DNS response in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Voice & Music, Snapdragon Wearables...

OESA-2021-1001 dnsmasq security update

Dnsmasq provides network infrastructure for small networks: DNS, DHCP, router advertisement and network boot. It is designed to be lightweight and have a small footprint, suitable for resource constrained routers and firewalls. It has also been widely used for tethering on smartphones and portabl...

The vulnerability of the `dns_packet_new` function in the system service of the `system-resolved` module of the Systemmd daemon in the Linux operating system allows a hacker to execute arbitrary code.

The vulnerability of the dnspacketnew function in the system service of the system-resolved manager in the Linux operating system is due to an operation that goes beyond the buffer boundaries in memory. Exploiting this vulnerability allows a remote attacker to cause the system-resolved service to...

CVE-2016-3213

The Web Proxy Auto Discovery WPAD protocol implementation in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold and 1511, and Internet Explorer 9 through 11 has an improper fallback mechanis...

glibc: getaddrinfo stack-based buffer overflow

A stack-based buffer overflow was found in the way the libresolv library performed dual A/AAAA DNS queries. A remote attacker could create a specially crafted DNS response which could cause libresolv to crash or, potentially, execute code with the permissions of the user running the library. Note...