CVE-2024-25629 c-ares out of bounds read in ares__read_line()

2024-02-2314:52:24

CWE-127

GitHub_M

www.cve.org

c-ares

asynchronous dns requests

memory read.

4.4 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

5.2 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.5%

JSON

c-ares is a C library for asynchronous DNS requests. ares__read_line() is used to parse local configuration files such as /etc/resolv.conf, /etc/nsswitch.conf, the HOSTALIASES file, and if using a c-ares version prior to 1.27.0, the /etc/hosts file. If any of these configuration files has an embedded NULL character as the first character in a new line, it can lead to attempting to read memory prior to the start of the given buffer which may result in a crash. This issue is fixed in c-ares 1.27.0. No known workarounds exist.

CNA Affected

[
  {
    "vendor": "c-ares",
    "product": "c-ares",
    "versions": [
      {
        "version": "< 1.27.0",
        "status": "affected"
      }
    ]
  }
]