Search vulnerabilities

Use the Query Builder to create your own search query, or check out the documentation to learn the search syntax.

Results 9

Export CSV
CVE-2022-4904

c-ares: buffer overflow in config_sortlist() due to missing string length check

A flaw was found in the c-ares package. The ares_set_sortlist is missing checks about the validity of the input string, which allows a possible arbitrary length stack overflow. This issue may cause a denial of service or a limited impact on confidentiality and integrity.

CVSS 3.1 · 8.6 High EPSS 1.2% KEV · Not listed
Vendors
C-ares Project Fedoraproject Redhat
Products
C-ares Fedora Enterprise Linux and 3 more
CVE-2020-8277

c-ares: ares_parse_{a,aaaa}_reply() insufficient naddrttls validation DoS

A Node.js application that allows an attacker to trigger a DNS request for a host of their choice could trigger a Denial of Service in versions < 15.2.1, < 14.15.1, and < 12.19.1 by getting the application to resolve a DNS record with a larger number of responses. This is fixed in 15.2.1, 14.15.1, and 12.19.1.

CVSS 3.1 · 7.5 High EPSS 54.2% KEV · Not listed
Vendors
C-ares Project Fedoraproject Nodejs and 2 more
Products
C-ares Fedora Node.js and 7 more
CVE-2017-1000381

c-ares: NAPTR parser out of bounds access

The c-ares function `ares_parse_naptr_reply()`, which is used for parsing NAPTR responses, could be triggered to read memory outside of the given input buffer if the passed in DNS response packet was crafted in a particular way.

CVSS 3.1 · 7.5 High EPSS 3.3% KEV · Not listed
Vendors
C-ares C-ares Project Nodejs and 1 more
Products
C-ares C-ares Node.js and 1 more
CVE-2016-5180

c-ares: Single byte out of buffer write

Heap-based buffer overflow in the ares_create_query function in c-ares 1.x before 1.12.0 allows remote attackers to cause a denial of service (out-of-bounds write) or possibly execute arbitrary code via a hostname with an escaped trailing dot.

CVSS 3.1 · 9.8 Critical EPSS 8.7% KEV · Not listed
Vendors
C-ares C-ares Project Canonical and 3 more
Products
C-ares C-ares Ubuntu Linux and 3 more
CVE-2023-31130

Buffer Underwrite in ares_inet_net_pton()

c-ares is an asynchronous resolver library. ares_inet_net_pton() is vulnerable to a buffer underflow for certain ipv6 addresses, in particular "0::00:00:00/2" was found to cause an issue. C-ares only uses this function internally for configuration purposes which would require an administrator to configure such an address via ares_set_sortlist(). However, users may externally use ares_inet_net_pton() for other purposes and thus be vulnerable to more severe issues. This issue has been fixed in 1.19.1.

CVSS 3.1 · 4.1 Medium EPSS < 1% KEV · Not listed
Vendors
C-ares Project Debian Fedoraproject and 1 more
Products
C-ares Debian Linux Fedora and 3 more
CVE-2023-31124

AutoTools does not set CARES_RANDOM_FILE during cross compilation

c-ares is an asynchronous resolver library. When cross-compiling c-ares and using the autotools build system, CARES_RANDOM_FILE will not be set, as seen when cross compiling aarch64 android. This will downgrade to using rand() as a fallback which could allow an attacker to take advantage of the lack of entropy by not using a CSPRNG. This issue was patched in version 1.19.1.

CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed
Vendors
C-ares Project Fedoraproject Redhat
Products
C-ares Fedora Enterprise Linux and 2 more
CVE-2023-32067

0-byte UDP payload DoS in c-ares

c-ares is an asynchronous resolver library. c-ares is vulnerable to denial of service. If a target resolver sends a query, the attacker forges a malformed UDP packet with a length of 0 and returns them to the target resolver. The target resolver erroneously interprets the 0 length as a graceful shutdown of the connection. This issue has been patched in version 1.19.1.

CVSS 3.1 · 7.5 High EPSS 1.6% KEV · Not listed
Vendors
C-ares C-ares Project Debian and 2 more
Products
C-ares C-ares Debian Linux and 7 more
CVE-2023-31147

Insufficient randomness in generation of DNS query IDs in c-ares

c-ares is an asynchronous resolver library. When /dev/urandom or RtlGenRandom() are unavailable, c-ares uses rand() to generate random numbers used for DNS query ids. This is not a CSPRNG, and it is also not seeded by srand() so will generate predictable output. Input from the random number generator is fed into a non-compilant RC4 implementation and may not be as strong as the original RC4 implementation. No attempt is made to look for modern OS-provided CSPRNGs like arc4random() that is widely available. This issue has been fixed in version 1.19.1.

CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed
Vendors
C-ares Project Fedoraproject Redhat
Products
C-ares Fedora Enterprise Linux and 2 more
CVE-2021-3672

c-ares: Missing input validation of host names may lead to domain hijacking

A flaw was found in c-ares library, where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability.

CVSS 3.1 · 5.6 Medium EPSS 2.8% KEV · Not listed
Vendors
C-ares Project Fedoraproject Nodejs and 3 more
Products
C-ares Fedora Node.js and 16 more