CVE-2013-7205
Off-by-one error in the process_cgivars function in contrib/daemonchk.c in Nagios Core 3.5.1, 4.0...
Off-by-one error in the process_cgivars function in contrib/daemonchk.c in Nagios Core 3.5.1, 4.0.2, and earlier allows remote authenticated users to obtain sensitive information from process memory or cause a denial of service (crash) via a long string in the last key value in the variable list, which triggers a heap-based buffer over-read.
Exploit likelihood
What each source reports
NVD Score used
6.4
Off-by-one error in the process_cgivars function in contrib/daemonchk.c in Nagios Core 3.5.1, 4.0.2, and earlier allows remote authenticated users to obtain sensitive information from process memory or cause a denial of service (crash) via a long string in the last key value in the variable list, which triggers a heap-based buffer over-read.
- Record
CVE-2013-7205- CVSS 2.0
- 6.4 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:P - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE List No score
Off-by-one error in the process_cgivars function in contrib/daemonchk.c in Nagios Core 3.5.1, 4.0.2, and earlier allows remote authenticated users to obtain sensitive information from process memory or cause a denial of service (crash) via a long string in the last key value in the variable list, which triggers a heap-based buffer over-read.
- Record
CVE-2013-7205- Updated
- 2026-11-02
EUVDEUVD-2013-6988 No score
Off-by-one error in the process_cgivars function in contrib/daemonchk.c in Nagios Core 3.5.1, 4.0.2, and earlier allows remote authenticated users to obtain sensitive information from process memory or cause a denial of service (crash) via a long string in the last key value in the variable list, which triggers a heap-based buffer over-read.
- Record
EUVD-2013-6988- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-m23h-2mvj-h557 No score
Off-by-one error in the process_cgivars function in contrib/daemonchk.c in Nagios Core 3.5.1, 4.0...
Off-by-one error in the process_cgivars function in contrib/daemonchk.c in Nagios Core 3.5.1, 4.0.2, and earlier allows remote authenticated users to obtain sensitive information from process memory or cause a denial of service (crash) via a long string in the last key value in the variable list, which triggers a heap-based buffer over-read.
- Record
GHSA-m23h-2mvj-h557- Weakness
- CWE-119
- Updated
- 2026-11-02
OSVMGASA-2014-0010 No score
Updated nagios package fixes security vulnerability
A flaw was reported and fixed in Nagios, which can be exploited to cause a denial of service. This vulnerability is caused due to an off-by-one error within the process_cgivars() function, which can be exploited to cause an out-of-bounds read by sending a specially-crafted key value to the Nagios web UI (CVE-2013-7108, CVE-2013-7205). An issue that prevented the service from starting has also been fixed.
- Record
MGASA-2014-0010- Updated
- 2026-11-02
OSVUBUNTU-CVE-2013-7205 No score
Off-by-one error in the process_cgivars function in contrib/daemonchk.c in Nagios Core 3.5.1, 4.0.2, and earlier allows remote authenticated users to obtain sensitive information from process memory or cause a denial of service (crash) via a long string in the last key value in the variable list, which triggers a heap-based buffer over-read.
- Record
UBUNTU-CVE-2013-7205- Updated
- 2026-11-02
OSVUSN-3253-1 No score
nagios3 vulnerabilities
It was discovered that Nagios incorrectly handled certain long strings. A remote authenticated attacker could use this issue to cause Nagios to crash, resulting in a denial of service, or possibly obtain sensitive information. (CVE-2013-7108, CVE-2013-7205)
It was discovered that Nagios incorrectly handled certain long messages to cmd.cgi. A remote attacker could possibly use this issue to cause Nagios to crash, resulting in a denial of service. (CVE-2014-1878)
Dawid Golunski discovered that Nagios incorrectly handled symlinks when accessing log files. A local attacker could possibly use this issue to elevate privileges. In the default installation of Ubuntu, this should be prevented by the Yama link restrictions. (CVE-2016-9566)
- Record
USN-3253-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
nagios3Debian:8 From an advisory covering 5 CVEs |
before 3.5.1.dfsg-2+deb8u1, plus listed versions 3.5.1.dfsg-2 |
3.5.1.dfsg-2+deb8u1 |
nagiosMageia:3 From an advisory covering 2 CVEs |
before 3.4.4-4.2.mga3 | 3.4.4-4.2.mga3 |
nagios3Ubuntu:14.04:LTS |
before 3.5.1-1ubuntu1.1, plus listed versions 3.4.1-5ubuntu23.4.1-5ubuntu33.5.1-1ubuntu1 |
3.5.1-1ubuntu1.1 |
nagios3Ubuntu:16.04:LTS |
before 3.5.1.dfsg-2.1ubuntu1.1, plus listed versions 3.5.1-1ubuntu43.5.1.dfsg-2ubuntu13.5.1.dfsg-2ubuntu23.5.1.dfsg-2.1ubuntu1 |
3.5.1.dfsg-2.1ubuntu1.1 |
nagios3Ubuntu:14.04:LTS From an advisory covering 4 CVEs |
before 3.5.1-1ubuntu1.1, plus listed versions 3.4.1-5ubuntu23.4.1-5ubuntu33.5.1-1ubuntu1 |
3.5.1-1ubuntu1.1 |
nagios3Ubuntu:16.04:LTS From an advisory covering 4 CVEs |
before 3.5.1.dfsg-2.1ubuntu1.1, plus listed versions 3.5.1-1ubuntu43.5.1.dfsg-2ubuntu13.5.1.dfsg-2ubuntu23.5.1.dfsg-2.1ubuntu1 |
3.5.1.dfsg-2.1ubuntu1.1 |
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.
In short
CVE-2013-7205 is a medium vulnerability (CVSS 6.4) in Nagios, published January 14, 2014. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.60%, the 91st percentile. Fixed in nagios3 3.5.1-1ubuntu1.1.
References
securityfocus.com/bid/64489
mandriva.com/security/advisories?name=MDVSA-2014:004
sourceforge.net/p/nagios/nagioscore/ci/d97e03f32741a7d851826b03ed73ff4c9612a866
lists.debian.org/debian-lts-announce/2018/12/msg00014.html
openwall.com/lists/oss-security/2013/12/24/1
secunia.com/advisories/55976
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nvd.nist.gov/vuln/detail/CVE-2013-7205
github.com/advisories/GHSA-m23h-2mvj-h557
advisories.mageia.org/MGASA-2014-0010.html
bugs.mageia.org/show_bug.cgi?id=12100
bugzilla.redhat.com/show_bug.cgi?id=1046113
ubuntu.com/security/CVE-2013-7205
ubuntu.com/security/notices/USN-3253-1
cve.org/CVERecord?id=CVE-2013-7205
ubuntu.com/security/CVE-2013-7108
ubuntu.com/security/CVE-2014-1878
ubuntu.com/security/CVE-2016-9566