CVE-2015-3294
The tcp_request function in Dnsmasq before 2.73rc4 does not properly handle the return value of...
CVE-2015-3294 is a medium vulnerability (CVSS 6.4) in Thekelleys Dnsmasq, published July 1, 2014. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.95%, the 92nd percentile. Fixed in dnsmasq 2.72-3.1.
- Severity
- 6.4 MediumCVSS 2.0, NVD
- Exploit chance
- 4.95%EPSS, 92nd percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
2.72-3.1dnsmasq +18 more
Description
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.
Exploit likelihood
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
dnsmasqDebian:12 | before 2.72-3.1 | 2.72-3.1 |
dnsmasqDebian:13 | before 2.72-3.1 | 2.72-3.1 |
dnsmasqDebian:14 | before 2.72-3.1 | 2.72-3.1 |
dnsmasqDebian:6.0 | before 2.55-2+deb6u1, plus listed versions 2.55-2 | 2.55-2+deb6u1 |
dnsmasqDebian:7 | before 2.62-3+deb7u2, plus listed versions 2.62-3+deb7u1 | 2.62-3+deb7u2 |
dnsmasqDebian:8 | before 2.72-3+deb8u1, plus listed versions 2.72-3 | 2.72-3+deb8u1 |
dnsmasqMageia:4 | before 2.66-3.1.mga4 | 2.66-3.1.mga4 |
dnsmasqSUSE:Linux Enterprise Desktop 12 | before 2.71-4.1 | 2.71-4.1 |
dnsmasqSUSE:Linux Enterprise Server 12 | before 2.71-4.1 | 2.71-4.1 |
dnsmasqSUSE:Linux Enterprise Server for SAP Applications 12 | before 2.71-4.1 | 2.71-4.1 |
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| Package | Affected | Fixed |
|---|---|---|
dnsmasqSUSE:Cloud Compute Node for SUSE Linux Enterprise 12 5 | before 2.71-4.1 | 2.71-4.1 |
dnsmasqSUSE:Linux Enterprise Server 12-LTSS From an advisory covering 8 CVEs | before 2.78-6.6.1 | 2.78-6.6.1 |
dnsmasqSUSE:Linux Enterprise Point of Sale 11 SP3 From an advisory covering 8 CVEs | before 2.78-0.16.5.1 | 2.78-0.16.5.1 |
dnsmasqSUSE:Linux Enterprise Server 11 SP3-LTSS From an advisory covering 8 CVEs | before 2.78-0.16.5.1 | 2.78-0.16.5.1 |
dnsmasqSUSE:Linux Enterprise Server 11 SP3-TERADATA From an advisory covering 8 CVEs | before 2.78-0.16.5.1 | 2.78-0.16.5.1 |
dnsmasqSUSE:Linux Enterprise Server 11 SP4 From an advisory covering 8 CVEs | before 2.78-0.17.5.1 | 2.78-0.17.5.1 |
dnsmasqSUSE:Linux Enterprise Server for SAP Applications 11 SP4 From an advisory covering 8 CVEs | before 2.78-0.17.5.1 | 2.78-0.17.5.1 |
dnsmasqUbuntu:14.04:LTS | before 2.68-1ubuntu0.1, plus listed versions 2.66-4ubuntu12.67-12.68-1 | 2.68-1ubuntu0.1 |
dnsmasqopenSUSE:Tumbleweed From an advisory covering 2 CVEs | before 2.76-1.3 | 2.76-1.3 |
What each source reports
NVD Score used
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.
- Record
CVE-2015-3294- CVSS 2.0
- 6.4 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:P - Weakness
- CWE-19
- Updated
- 2026-11-02
CVE ListNo score
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.
- Record
CVE-2015-3294- Updated
- 2026-11-02
EUVDEUVD-2015-3341No score
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.
- Record
EUVD-2015-3341- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-68qg-cgxp-wxcfNo score
The tcp_request function in Dnsmasq before 2.73rc4 does not properly handle the return value of...
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.
- Record
GHSA-68qg-cgxp-wxcf- Updated
- 2026-11-02
OSVBELL-CVE-2015-3294
CVE-2015-3294 does not affect BellSoft software
- Record
BELL-CVE-2015-3294- CVSS 2.0
- 6.4 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:P - Updated
- 2026-11-02
OSVNo score
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.
- Record
CVE-2015-3294- Updated
- 2026-11-02
Show 11 moreShow less
OSVDEBIAN-CVE-2015-3294No score
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.
- Record
DEBIAN-CVE-2015-3294- Updated
- 2026-11-02
OSVMGASA-2015-0214No score
Updated dnsmasq packages fix CVE-2015-3294
Updated dnsmasq packages fix security vulnerability:
Dnsmasq could be made to crash or expose sensitive information if it received specially crafted network traffic (CVE-2015-3294).
- Record
MGASA-2015-0214- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10195-1No score
dnsmasq-2.76-1.3 on GA media
These are all security issues fixed in the dnsmasq-2.76-1.3 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10195-1- Updated
- 2026-11-02
OSVSUSE-SU-2015:0979-1No score
Security update for dnsmasq
The DNS server dnsmasq was updated to fix one security issue and one non-security bug.
The following vulnerability was fixed:
- CVE-2015-3294: A remote unauthenticated attacker could have caused a denial of service (DoS) or read heap memory, potentially disclosing information such as performed DNS queries or encryption keys. (bsc#928867)
The following bug was fixed:
- bsc#923144: When answer to an upstream query is a CNAME pointing to an A/AAAA record which is present locally (/etc/hosts), allow caching when the upstream and local A/AAAA records have the same value.
- Record
SUSE-SU-2015:0979-1- Updated
- 2026-11-02
OSVSUSE-SU-2015:0979-2No score
Security update for dnsmasq
The DNS server dnsmasq was updated to fix one security issue and one non-security bug.
The following vulnerability was fixed:
- CVE-2015-3294: A remote unauthenticated attacker could have caused a denial of service (DoS) or read heap memory, potentially disclosing information such as performed DNS queries or encryption keys. (bsc#928867)
The following bug was fixed:
- bsc#923144: When answer to an upstream query is a CNAME pointing to an A/AAAA record which is present locally (/etc/hosts), allow caching when the upstream and local A/AAAA records have the same value.
- Record
SUSE-SU-2015:0979-2- Updated
- 2026-11-02
OSVSUSE-SU-2015:1015-1No score
Recommended update for dnsmasq
This update provides dnsmasq version 2.71, which brings several fixes and enhancements. For a comprehensive list of changes, please refer to the package change log. (FATE#317370)
- Record
SUSE-SU-2015:1015-1- Updated
- 2026-11-02
OSVSUSE-SU-2017:2616-1No score
Security update for dnsmasq
This update for dnsmasq fixes the following issues.
Remedy the following security issues:
- CVE-2017-14491: 2 byte heap based overflow. [bsc#1060354]
- CVE-2017-14492: heap based overflow. [bsc#1060355]
- CVE-2017-14493: stack based overflow. [bsc#1060360]
- CVE-2017-14494: DHCP - info leak. [bsc#1060361]
- CVE-2017-14495: DNS - OOM DoS. [bsc#1060362]
- CVE-2017-14496: DNS - DoS Integer underflow. [bsc#1060364]
- Prevent a man-in-the-middle attack (bsc#972164, fate#321175).
Furthermore, the following issues have been fixed:
- Fix DHCP relaying, broken in 2.76 and 2.77.
- Update to version 2.78 (fate#321175, fate#322030, bsc#1035227).
- Fix PXE booting for UEFI architectures (fate#322030).
- Drop PrivateDevices=yes which breaks logging (bsc#902511, bsc#904537)
- Build with support for DNSSEC (fate#318323, bsc#908137).
Please note that this update brings a (small) potential incompatibility in the handling of 'basename' in --pxe-service. Please read the CHANGELOG and the documentation if you are using this option.
- Record
SUSE-SU-2017:2616-1- Updated
- 2026-11-02
OSVSUSE-SU-2017:2617-1No score
Security update for dnsmasq
This update for dnsmasq fixes the following security issues:
- CVE-2017-14491: 2 byte heap based overflow. [bsc#1060354]
- CVE-2017-14492: heap based overflow. [bsc#1060355]
- CVE-2017-14493: stack based overflow. [bsc#1060360]
- CVE-2017-14494: DHCP - info leak. [bsc#1060361]
- CVE-2017-14495: DNS - OOM DoS. [bsc#1060362]
- CVE-2017-14496: DNS - DoS Integer underflow. [bsc#1060364]
This update brings a (small) potential incompatibility in the handling of 'basename' in --pxe-service. Please read the CHANGELOG and the documentation if you are using this option.
- Record
SUSE-SU-2017:2617-1- Updated
- 2026-11-02
OSVSUSE-SU-2017:2619-1No score
Security update for dnsmasq
This update for dnsmasq fixes the following security issues:
- CVE-2017-14491: 2 byte heap based overflow. [bsc#1060354]
- CVE-2017-14492: heap based overflow. [bsc#1060355]
- CVE-2017-14493: stack based overflow. [bsc#1060360]
- CVE-2017-14494: DHCP - info leak. [bsc#1060361]
- CVE-2017-14495: DNS - OOM DoS. [bsc#1060362]
- CVE-2017-14496: DNS - DoS Integer underflow. [bsc#1060364]
This update brings a (small) potential incompatibility in the handling of 'basename' in --pxe-service. Please read the CHANGELOG and the documentation if you are using this option.
- Record
SUSE-SU-2017:2619-1- Updated
- 2026-11-02
OSVUBUNTU-CVE-2015-3294No score
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.
- Record
UBUNTU-CVE-2015-3294- Updated
- 2026-11-02
OSVUSN-2593-1No score
dnsmasq vulnerability
Nick Sampanis discovered that Dnsmasq incorrectly handled certain malformed DNS requests. A remote attacker could use this issue to cause Dnsmasq to crash, resulting in a denial of service, or possibly obtain sensitive information.
- Record
USN-2593-1- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
debian.org/security/2015/dsa-3251
lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2015q2/009382.html
lists.opensuse.org/opensuse-updates/2015-05/msg00013.html
thekelleys.org.uk/gitweb?p=dnsmasq.git%3Ba=commitdiff%3Bh=ad4a8ff7d9097008d7623df8543df435bfddeac8
oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html
ubuntu.com/usn/USN-2593-1
Show 46 moreShow less
security.gentoo.org/glsa/201512-01
securitytracker.com/id/1032195
securityfocus.com/bid/74452
nvd.nist.gov/vuln/detail/CVE-2015-3294
github.com/advisories/GHSA-68qg-cgxp-wxcf
docs.bell-sw.com/security/cves/CVE-2015-3294
security-tracker.debian.org/tracker/CVE-2015-3294
advisories.mageia.org/MGASA-2015-0214.html
bugs.mageia.org/show_bug.cgi?id=15855
suse.com/support/update/announcement/2015/suse-su-20150979-1
bugzilla.suse.com/923144
ubuntu.com/security/CVE-2015-3294
obrela.com/home/security-labs/advisories/osi-advisory-osi-1502
cve.org/CVERecord?id=CVE-2015-3294