CVE-2009-0759

Multiple CRLF injection vulnerabilities in webadmin in ZNC before 0.066 allow remote authenticated users to modify the znc.conf configuration file and gain privileges via CRLF sequences in the quit message and other vectors.

Published: 2009-03-03 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-0759 is rated Moderate Risk (50.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.74%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-0759

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-04-27 0.86% 0.74% -0.12%
2 2025-03-17 0.54% 0.86% +0.32%
3 2023-03-07 — 0.54% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-0759

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 2.0 MEDIUM
AV:N/AC:L/Au:S/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 6.4 [email protected]

Weakness enumeration for CVE-2009-0759

OS Trackers for CVE-2009-0759

vendor priority summary link
debian not yet assigned CVE-2009-0759 not yet assigned priority: Debian including 1 source packages (znc), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2009-0759
gentoo high CVE-2009-0759: 1 GLSA(s) (200903-02), 1 atom(s) (net-irc/znc); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2009-0759
ubuntu medium CVE-2009-0759 medium priority: Ubuntu including 1 source packages (znc), 11 status rows across 11 suites (dapper, gutsy, hardy, intrepid, jaunty, karmic, lucid, maverick, natty, oneiric, upstream): not-affected 5, ignored 4, DNE 1, released 1. https://ubuntu.com/security/CVE-2009-0759

Affected software / configurations for CVE-2009-0759

Vendor Product Version Raw CPE
znc znc <= 0.062 cpe:2.3:a:znc:znc:*:*:*:*:*:*:*:*
znc znc 0.056 cpe:2.3:a:znc:znc:0.056:*:*:*:*:*:*:*
znc znc 0.058 cpe:2.3:a:znc:znc:0.058:*:*:*:*:*:*:*

References for CVE-2009-0759

cvelogic Threat Intelligence