CVE-2007-1030

Niels Provos libevent 1.2 and 1.2a allows remote attackers to cause a denial of service (infinite loop) via a DNS response containing a label pointer that references its own offset.

Published: 2007-02-21 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2007-1030 is rated Moderate Risk (62.6/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.01%). EPSS rose +1.42% over the last day, indicating growing attacker interest. 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-2007-1030

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 2026-06-15 1.59% 3.01% +1.42%
2 2026-03-17 1.54% 1.59% +0.06%
3 2025-10-10 — 1.54% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2007-1030

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C 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:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2007-1030

OS Trackers for CVE-2007-1030

vendor priority summary link
debian unimportant CVE-2007-1030 unimportant priority: Debian including 1 source packages (libevent), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2007-1030
redhat — — https://access.redhat.com/security/cve/CVE-2007-1030
ubuntu medium CVE-2007-1030 medium priority: Ubuntu including 1 source packages (libevent), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): not-affected 3, needs-triage 1. https://ubuntu.com/security/CVE-2007-1030

Vendor comments (NVD) for CVE-2007-1030

  • Red Hat (2008-04-04T00:00:00)

    Not vulnerable. This issue did not affect versions of libevent as shipped with Red Hat Enterprise Linux 5.

Affected software / configurations for CVE-2007-1030

Vendor Product Version Raw CPE
niels_provos libevent 1.2 cpe:2.3:a:niels_provos:libevent:1.2:*:*:*:*:*:*:*
niels_provos libevent 1.2a cpe:2.3:a:niels_provos:libevent:1.2a:*:*:*:*:*:*:*

References for CVE-2007-1030

cvelogic Threat Intelligence