CVE-2023-31130
Medium
Description
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.
SeverityMedium
CVSS4.1
Exploit probability—
Product
C-ares
PublishedMay 25, 2023
First seenMay 25, 2023
Weakness typeCWE-124CWE-124
How to fix
Update
- c-ares_project c-ares1.19.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| c-ares_project c-ares | v < 1.19.1 | 1.19.1 |
| fedoraproject fedora | 37, 38 | — |
| debian debian_linux | 10.0, 11.0 | — |
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