Overview
- Description
- 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.
- Source
- security-advisories@github.com
- NVD status
- Analyzed
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 6.5
- Impact score
- 2.5
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- Severity
- MEDIUM
Social media
- Hype score
- Not currently trending
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:c-ares_project:c-ares:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "48937B75-3746-49D9-B738-B19EF0EF8D9F",
"versionEndExcluding": "1.19.1"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E30D0E6F-4AE8-4284-8716-991DFA48CC5D"
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "CC559B26-5DFC-4B7A-A27C-B77DE755DFF9"
}
],
"operator": "OR"
}
]
}
]