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Fencer Intel
medium 6.4

CVE-2015-3294 json

The tcp_request function in Dnsmasq before 2.73rc4 does not properly handle the return value of the setup_reply function, which allows remo…

published 2015-05-08 11 y ago modified 2026-06-17 4 mo ago also EUVD-2015-3341

cvss
6.4
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.0%
EPSS 5.0% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

The tcp_request function in Dnsmasq before 2.73rc4 does not properly handle the return value of the setup_reply function, which allows remote attackers to read process memory and cause a denial of service (out-of-bounds read and crash) via a malformed DNS request.

Patch / fix

  • dnsmasq Debian 14, Debian 13, Debian 12 2.72-3.1

debian advisories DEBIAN-CVE-2015-3294

  • dnsmasq Ubuntu 14.04 LTS 2.68-1ubuntu0.1

ubuntu advisories UBUNTU-CVE-2015-3294

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

  • dnsmasq SLES 11 SP3-TERADATA, SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 2.78-0.16.5.1
  • dnsmasq SLES for SAP 11 SP4, SLES 11 SP4 2.78-0.17.5.1
  • dnsmasq SLES 12, SLED 12, Cloud Compute Node for SUSE Linux Enterprise 12 5 +1 more 2.71-4.1
  • dnsmasq SLES 12-LTSS 2.78-6.6.1

suse advisories SUSE-SU-2017:2617-1SUSE-SU-2017:2616-1SUSE-SU-2017:2619-1SUSE-SU-2015:0979-2SUSE-SU-2015:0979-1

  • dnsmasq openSUSE Tumbleweed 2.76-1.3

opensuse advisories openSUSE-SU-2024:10195-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-3294 updated cvss 4.3

dnsmasq: unchecked return value of the setup_reply() function

  • Red Hat Enterprise Linux 5 dnsmasq Red Hat Enterprise Linux 6 dnsmasq, dnsmasq-utils Red Hat Enterprise Linux 7 dnsmasq, dnsmasq-utils Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse) dnsmasq Red Hat Enterprise Linux OpenStack Platform 6 (Juno) dnsmasq Red Hat OpenStack Platform 4 dnsmasq
    affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.95% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • lists.thekelleys.org.uk http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2015q2/009382.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:P/I:N/A:P

Classification

Weakness
  • CWE-19 Data Processing Errors

References

Sources

Fencer Intel 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.