CVE-2012-1820

The bgp_capability_orf function in bgpd in Quagga 0.99.20.1 and earlier allows remote attackers to cause a denial of service (assertion failure and daemon exit) by leveraging a BGP peering relationship and sending a malformed Outbound Route Filtering (ORF) capability TLV in an OPEN message.

Published: 2012-06-13 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2012-1820 is rated Low Risk (24.5/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.18%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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-2012-1820

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 0.32% 0.18% -0.14%
2 2025-03-29 0.22% 0.32% +0.10%
3 2025-03-17 — 0.22% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2012-1820

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
2.9 2.0 LOW
AV:A/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 5.5 2.9 [email protected]

Weakness enumeration for CVE-2012-1820

OS Trackers for CVE-2012-1820

vendor priority summary link
gentoo normal CVE-2012-1820: 1 GLSA(s) (201310-08), 1 atom(s) (net-misc/quagga); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2012-1820
redhat low — https://access.redhat.com/security/cve/CVE-2012-1820
ubuntu medium CVE-2012-1820 medium priority: Ubuntu including 1 source packages (quagga), 6 status rows across 6 suites (hardy, lucid, natty, oneiric, precise, upstream): released 4, ignored 1, needs-triage 1. https://ubuntu.com/security/CVE-2012-1820

Affected software / configurations for CVE-2012-1820

Vendor Product Version Raw CPE
quagga quagga <= 0.99.20.1 cpe:2.3:a:quagga:quagga:*:*:*:*:*:*:*:*
quagga quagga 0.95 cpe:2.3:a:quagga:quagga:0.95:*:*:*:*:*:*:*
quagga quagga 0.96 cpe:2.3:a:quagga:quagga:0.96:*:*:*:*:*:*:*
quagga quagga 0.96.1 cpe:2.3:a:quagga:quagga:0.96.1:*:*:*:*:*:*:*
quagga quagga 0.96.2 cpe:2.3:a:quagga:quagga:0.96.2:*:*:*:*:*:*:*
quagga quagga 0.96.3 cpe:2.3:a:quagga:quagga:0.96.3:*:*:*:*:*:*:*
quagga quagga 0.96.4 cpe:2.3:a:quagga:quagga:0.96.4:*:*:*:*:*:*:*
quagga quagga 0.96.5 cpe:2.3:a:quagga:quagga:0.96.5:*:*:*:*:*:*:*
quagga quagga 0.97.0 cpe:2.3:a:quagga:quagga:0.97.0:*:*:*:*:*:*:*
quagga quagga 0.97.1 cpe:2.3:a:quagga:quagga:0.97.1:*:*:*:*:*:*:*
quagga quagga 0.97.2 cpe:2.3:a:quagga:quagga:0.97.2:*:*:*:*:*:*:*
quagga quagga 0.97.3 cpe:2.3:a:quagga:quagga:0.97.3:*:*:*:*:*:*:*
quagga quagga 0.97.4 cpe:2.3:a:quagga:quagga:0.97.4:*:*:*:*:*:*:*
quagga quagga 0.97.5 cpe:2.3:a:quagga:quagga:0.97.5:*:*:*:*:*:*:*
quagga quagga 0.98.0 cpe:2.3:a:quagga:quagga:0.98.0:*:*:*:*:*:*:*
quagga quagga 0.98.1 cpe:2.3:a:quagga:quagga:0.98.1:*:*:*:*:*:*:*
quagga quagga 0.98.2 cpe:2.3:a:quagga:quagga:0.98.2:*:*:*:*:*:*:*
quagga quagga 0.98.3 cpe:2.3:a:quagga:quagga:0.98.3:*:*:*:*:*:*:*
quagga quagga 0.98.4 cpe:2.3:a:quagga:quagga:0.98.4:*:*:*:*:*:*:*
quagga quagga 0.98.5 cpe:2.3:a:quagga:quagga:0.98.5:*:*:*:*:*:*:*
quagga quagga 0.98.6 cpe:2.3:a:quagga:quagga:0.98.6:*:*:*:*:*:*:*
quagga quagga 0.99.1 cpe:2.3:a:quagga:quagga:0.99.1:*:*:*:*:*:*:*
quagga quagga 0.99.2 cpe:2.3:a:quagga:quagga:0.99.2:*:*:*:*:*:*:*
quagga quagga 0.99.3 cpe:2.3:a:quagga:quagga:0.99.3:*:*:*:*:*:*:*
quagga quagga 0.99.4 cpe:2.3:a:quagga:quagga:0.99.4:*:*:*:*:*:*:*
quagga quagga 0.99.5 cpe:2.3:a:quagga:quagga:0.99.5:*:*:*:*:*:*:*
quagga quagga 0.99.6 cpe:2.3:a:quagga:quagga:0.99.6:*:*:*:*:*:*:*
quagga quagga 0.99.7 cpe:2.3:a:quagga:quagga:0.99.7:*:*:*:*:*:*:*
quagga quagga 0.99.8 cpe:2.3:a:quagga:quagga:0.99.8:*:*:*:*:*:*:*
quagga quagga 0.99.9 cpe:2.3:a:quagga:quagga:0.99.9:*:*:*:*:*:*:*
quagga quagga 0.99.10 cpe:2.3:a:quagga:quagga:0.99.10:*:*:*:*:*:*:*
quagga quagga 0.99.11 cpe:2.3:a:quagga:quagga:0.99.11:*:*:*:*:*:*:*
quagga quagga 0.99.12 cpe:2.3:a:quagga:quagga:0.99.12:*:*:*:*:*:*:*
quagga quagga 0.99.13 cpe:2.3:a:quagga:quagga:0.99.13:*:*:*:*:*:*:*
quagga quagga 0.99.14 cpe:2.3:a:quagga:quagga:0.99.14:*:*:*:*:*:*:*
quagga quagga 0.99.15 cpe:2.3:a:quagga:quagga:0.99.15:*:*:*:*:*:*:*
quagga quagga 0.99.16 cpe:2.3:a:quagga:quagga:0.99.16:*:*:*:*:*:*:*
quagga quagga 0.99.17 cpe:2.3:a:quagga:quagga:0.99.17:*:*:*:*:*:*:*
quagga quagga 0.99.18 cpe:2.3:a:quagga:quagga:0.99.18:*:*:*:*:*:*:*
quagga quagga 0.99.19 cpe:2.3:a:quagga:quagga:0.99.19:*:*:*:*:*:*:*
quagga quagga 0.99.20 cpe:2.3:a:quagga:quagga:0.99.20:*:*:*:*:*:*:*

References for CVE-2012-1820

cvelogic Threat Intelligence