C-Ares vulnerabilitiesRanked by how likely they are to be used.

Product66 versions
The short answer

C-Ares is made by C-Ares. We track 5 published vulnerabilities in it, across 66 versions. None of them is on the list of flaws known to be exploited today. If you run C-Ares, keep it on a version the vendor still supports.

See the riskiest flaws

We keep watching the known-exploited list.

Known exploited

Which C-Ares vulnerabilities are being exploited?

This is the list that matters most: flaws criminals are using now.

None of C-Ares's published vulnerabilities is on the list of flaws known to be exploited today. We keep watching that list.

Exploit likelihood

Which C-Ares flaws are most likely to be used?

Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.

50% or more10% to 49%Under 10%
  1. 8.6%

    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...

    CVSS9.8Published3 Oct 2016
  2. 3.3%

    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...

    CVSS7.5Published7 Jul 2017
  3. 1.0%

    Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in ares_parse_soa_reply.c.

    CVSS5.9Published22 Aug 2023
  4. 0.5%

    A possible use-after-free and double-free in c-ares lib version 1.16.0 if ares_destroy() is called prior to ares_getaddrinfo() completing.

    CVSS3.3Published13 May 2021
  5. 0.4%

    c-ares is a C library for asynchronous DNS requests.

    CVSS4.4Published23 Feb 2024
Precursor Intelligence

Running C-Ares? We'll keep checking.

Looking flaws up one at a time doesn't scale. Tell us what you run once, and we tell you which flaws matter to you, in what order, and keep watching for new ones.

  1. Tell us what you runPick your software from a list, or let us work it out from your website.
  2. We match it to every flawOver 400,000 published flaws, checked against your list.
  3. Ranked by real-world riskA 0 to 100 score, led by evidence criminals are using it.
  4. Told as soon as we knowAn alert by email, in the app or by webhook to your own tools.

Free plan, no card needed. Nothing to install.

FAQ

Common questions, answered plainly.

Something else? Talk to the team →

We track 5 published vulnerabilities listed under the name C-Ares, across 66 versions.

None of C-Ares's vulnerabilities is on the list of flaws known to be exploited today.

Create a Precursor Intelligence account and track C-Ares. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.