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
6.8 Medium
AI Score
Confidence
Low
0.0004 Low
EPSS
Percentile
15.5%
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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | c-ares | < 1.14.0-1ubuntu0.2+esm2 | UNKNOWN |
ubuntu | 20.04 | noarch | c-ares | < 1.15.0-1ubuntu0.5 | UNKNOWN |
ubuntu | 22.04 | noarch | c-ares | < 1.18.1-1ubuntu0.22.04.3 | UNKNOWN |
ubuntu | 23.10 | noarch | c-ares | < 1.19.1-3ubuntu0.1 | UNKNOWN |
ubuntu | 16.04 | noarch | c-ares | < 1.10.0-3ubuntu0.2+esm3 | UNKNOWN |
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
6.8 Medium
AI Score
Confidence
Low
0.0004 Low
EPSS
Percentile
15.5%