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Fencer Vulns
high 7.5

CVE-2017-15650 json

musl libc before 1.1.17 has a buffer overflow via crafted DNS replies because dns_parse_callback in network/lookup_name.c does not restrict…

published 2017-10-19 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-7101

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

musl libc before 1.1.17 has a buffer overflow via crafted DNS replies because dns_parse_callback in network/lookup_name.c does not restrict the number of addresses, and thus an attacker can provide an unexpected number by sending A records in a reply to an AAAA query.

Patch / fix

  • musl Debian 14, Debian 13, Debian 12 1.1.17-1

debian advisories DEBIAN-CVE-2017-15650

  • musl Ubuntu Pro 16.04 LTS 1.1.9-1ubuntu0.1~esm2

ubuntu advisories UBUNTU-CVE-2017-15650

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • musl Alpine 3.2 1.1.11-r5
  • musl Alpine 3.3 1.1.12-r8
  • musl Alpine 3.4 1.1.14-r16
  • musl Alpine 3.5 1.1.15-r8
  • musl Alpine 3.6 1.1.16-r14

alpine advisories ALPINE-CVE-2017-15650

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • musl Arch Linux 1.1.17-1

arch linux advisories AVG-457

Exploit prediction

2.03% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.