CVE-2012-1820

What it is

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.

At a glance

Exploitability

Can be exploited from the same network segment without logging in. Limited direct impact.

Exploit odds

1.0% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2012-06-13 15:55 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:40 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.0% in the next 30 days (EPSS).
• Severity: 2.9 LOW (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2012-06-13 15:55 UTC

Last modified

2026-06-16 23:40 UTC

Exploit probability

1.0% · EPSS, next 30 days

Record status

Modified

Affected

• Quagga ≤ 0.99.20.1
• Quagga 0.95
• Quagga 0.96
• Quagga 0.96.1
• Quagga 0.96.2
• Quagga 0.96.3
• Quagga 0.96.4
• Quagga 0.96.5

Attack profile CVSS 2.0 · 2.9

Attack vector

Adjacent network

Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

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