CVE-2009-0363

Multiple buffer overflows in (a) BarnOwl before 1.0.5 and (b) owl 2.1.11 allow remote attackers to execute arbitrary code via vectors involving (1) a crafted zcrypt message, related to zcrypt.c; (2) a reply command on a message with a Zephyr Cc: list, related to zwrite.c; and unspecified other use of the products.

Published: 2009-02-17 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-0363 is rated Moderate Risk (60.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 4.32%). 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-2009-0363

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 2025-03-30 4.37% 4.32% -0.04%
2 2025-03-29 4.32% 4.37% +0.04%
3 2025-03-19 — 4.32% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-0363

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/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:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2009-0363

OS Trackers for CVE-2009-0363

vendor priority summary link
debian not yet assigned CVE-2009-0363 not yet assigned priority: Debian including 1 source packages (barnowl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2009-0363
ubuntu medium CVE-2009-0363 medium priority: Ubuntu including 2 source packages (barnowl, owl), 22 status rows across 11 suites (dapper, gutsy, hardy, intrepid, jaunty, karmic, lucid, maverick, natty, oneiric, upstream): not-affected 12, ignored 5, DNE 3, released 2. https://ubuntu.com/security/CVE-2009-0363

Affected software / configurations for CVE-2009-0363

Vendor Product Version Raw CPE
barnowl barnowl <= 1.0.4.1 cpe:2.3:a:barnowl:barnowl:*:*:*:*:*:*:*:*
barnowl barnowl 1.0.0 cpe:2.3:a:barnowl:barnowl:1.0.0:*:*:*:*:*:*:*
barnowl barnowl 1.0.1 cpe:2.3:a:barnowl:barnowl:1.0.1:*:*:*:*:*:*:*
barnowl barnowl 1.0.2 cpe:2.3:a:barnowl:barnowl:1.0.2:*:*:*:*:*:*:*
barnowl barnowl 1.0.2.1 cpe:2.3:a:barnowl:barnowl:1.0.2.1:*:*:*:*:*:*:*
barnowl barnowl 1.0.3 cpe:2.3:a:barnowl:barnowl:1.0.3:*:*:*:*:*:*:*
barnowl barnowl 1.0.4 cpe:2.3:a:barnowl:barnowl:1.0.4:*:*:*:*:*:*:*
ktools owl 2.1.11 cpe:2.3:a:ktools:owl:2.1.11:*:*:*:*:*:*:*

References for CVE-2009-0363

cvelogic Threat Intelligence