CVE-2017-6519
9.1
CRITICAL · CVSS 3.1 · EPSS 3.2% (pctl 88)
In your normal cycle
Critical by CVSS (9.1), but no sign of active exploitation.
Description
avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive information from the responding device via port-5353 UDP packets. NOTE: this may overlap CVE-2015-2809.
Scoring
| CVSS | 9.1 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| EPSS | 3.24% — more likely to be exploited than 88% of all CVEs |
| Weakness | CWE-346 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2017-05-01 |
| Last modified | 2026-06-17 |
Affected (2)
| Vendor | Product |
|---|---|
| avahi | avahi |
| canonical | ubuntu linux |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1426712
- https://github.com/lathiat/avahi/issues/203
- https://github.com/lathiat/avahi/issues/203#issuecomment-449536790
- https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E
- https://usn.ubuntu.com/3876-1/
- https://usn.ubuntu.com/3876-2/
- https://www.secfu.net/advisories
- https://bugzilla.redhat.com/show_bug.cgi?id=1426712
- https://github.com/lathiat/avahi/issues/203
- https://github.com/lathiat/avahi/issues/203#issuecomment-449536790
- https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E
- https://usn.ubuntu.com/3876-1/
- https://usn.ubuntu.com/3876-2/
- https://www.secfu.net/advisories
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