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8 vulnerabilities found for BIRD by nic
CVE-2026-112112 (GCVE-0-2026-112112)
Vulnerability from nvd – Published: 2026-10-18 23:01 – Updated: 2026-10-18 23:01
VLAI
EPSS
VEX
Summary
An IPv6 FlowSpec validation bypass in the CZ.NIC BIRD Internet Routing Daemon allows an established BGP peer to inject FlowSpec rules matching destinations outside the address space authorized by the unicast-route validation procedure. With validation enabled on the receiving flow6 channel, BIRD fails to reject a destination prefix component with a nonzero offset, contrary to RFC 8956 section 5. It validates a reconstructed prefix with zero-filled skipped bits, although the original FlowSpec component can match a broader set of IPv6 addresses. Given a suitable unicast route from the peer, the rule can pass validation and, where export policy permits, be propagated to downstream peers. Downstream enforcement may cause unauthorized traffic filtering or redirection.
Severity
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
Impacted products
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CVE-2026-49943 (GCVE-0-2026-49943)
Vulnerability from nvd – Published: 2026-06-02 16:16 – Updated: 2026-06-02 18:24
VLAI
EPSS
VEX
Summary
CZ.NIC BIRD Internet Routing Daemon through 2.19.0 contains a stack-based buffer overflow in the BGP AS_PATH mask matching implementation in nest/a-path.c. The as_path_match() function uses a fixed-size stack array of 2048 + 1 pm_pos entries, while parse_path() expands AS_PATH segments from a received BGP UPDATE without enforcing a corresponding capacity limit. When RFC 8654 BGP Extended Messages are enabled and a BIRD filter evaluates an AS path mask expression such as "bgp_path ~ [= ... =]", an established BGP peer can send a long AS_PATH containing more than 2048 expanded ASNs. This causes parse_path()/as_path_match() to write beyond the fixed stack buffer, resulting in a crash of the daemon. NOTE: reportedly, the Supplier's position is that a fix is not being prioritized because all network operators should already be rejecting routes with unusually long attributes.
Severity
6.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-02 18:20 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
2 references
Impacted products
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CVE-2021-26928 (GCVE-0-2021-26928)
Vulnerability from nvd – Published: 2021-06-04 20:13 – Updated: 2024-08-03 20:33 Disputed
VLAI
EPSS
VEX
Summary
BIRD through 2.0.7 does not provide functionality for password authentication of BGP peers. Because of this, products that use BIRD (which may, for example, include Tigera products in some configurations, as well as products of other vendors) may have been susceptible to route redirection for Denial of Service and/or Information Disclosure. NOTE: a researcher has asserted that the behavior is within Tigera’s area of responsibility; however, Tigera disagrees
Severity
6.8 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-01 15:15 UTC
CWE
- n/a
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.cyberark.com/resources/threat-researc… | x_refsource_MISC |
Impacted products
Date Public
2021-05-17 00:00
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CVE-2019-16159 (GCVE-0-2019-16159)
Vulnerability from nvd – Published: 2019-09-09 14:34 – Updated: 2024-08-05 01:10
VLAI
EPSS
VEX
Summary
BIRD Internet Routing Daemon 1.6.x through 1.6.7 and 2.x through 2.0.5 has a stack-based buffer overflow. The BGP daemon's support for RFC 8203 administrative shutdown communication messages included an incorrect logical expression when checking the validity of an input message. Sending a shutdown communication with a sufficient message length causes a four-byte overflow to occur while processing the message, where two of the overflow bytes are attacker-controlled and two are fixed.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://gitlab.labs.nic.cz/labs/bird/commit/8388f… | x_refsource_MISC |
| https://gitlab.labs.nic.cz/labs/bird/commit/1657c… | x_refsource_MISC |
| http://trubka.network.cz/pipermail/bird-users/201… | x_refsource_MISC |
| http://trubka.network.cz/pipermail/bird-users/201… | x_refsource_MISC |
| http://trubka.network.cz/pipermail/bird-users/201… | x_refsource_MISC |
| http://bird.network.cz | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://seclists.org/bugtraq/2019/Sep/34 | mailing-listx_refsource_BUGTRAQ |
| https://www.debian.org/security/2019/dsa-4528 | vendor-advisoryx_refsource_DEBIAN |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
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CVE-2026-112112 (GCVE-0-2026-112112)
Vulnerability from cvelistv5 – Published: 2026-10-18 23:01 – Updated: 2026-10-18 23:01
VLAI
EPSS
VEX
Summary
An IPv6 FlowSpec validation bypass in the CZ.NIC BIRD Internet Routing Daemon allows an established BGP peer to inject FlowSpec rules matching destinations outside the address space authorized by the unicast-route validation procedure. With validation enabled on the receiving flow6 channel, BIRD fails to reject a destination prefix component with a nonzero offset, contrary to RFC 8956 section 5. It validates a reconstructed prefix with zero-filled skipped bits, although the original FlowSpec component can match a broader set of IPv6 addresses. Given a suitable unicast route from the peer, the rule can pass validation and, where export policy permits, be propagated to downstream peers. Downstream enforcement may cause unauthorized traffic filtering or redirection.
Severity
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
Impacted products
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CVE-2026-49943 (GCVE-0-2026-49943)
Vulnerability from cvelistv5 – Published: 2026-06-02 16:16 – Updated: 2026-06-02 18:24
VLAI
EPSS
VEX
Summary
CZ.NIC BIRD Internet Routing Daemon through 2.19.0 contains a stack-based buffer overflow in the BGP AS_PATH mask matching implementation in nest/a-path.c. The as_path_match() function uses a fixed-size stack array of 2048 + 1 pm_pos entries, while parse_path() expands AS_PATH segments from a received BGP UPDATE without enforcing a corresponding capacity limit. When RFC 8654 BGP Extended Messages are enabled and a BIRD filter evaluates an AS path mask expression such as "bgp_path ~ [= ... =]", an established BGP peer can send a long AS_PATH containing more than 2048 expanded ASNs. This causes parse_path()/as_path_match() to write beyond the fixed stack buffer, resulting in a crash of the daemon. NOTE: reportedly, the Supplier's position is that a fix is not being prioritized because all network operators should already be rejecting routes with unusually long attributes.
Severity
6.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-02 18:20 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
2 references
Impacted products
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CVE-2021-26928 (GCVE-0-2021-26928)
Vulnerability from cvelistv5 – Published: 2021-06-04 20:13 – Updated: 2024-08-03 20:33 Disputed
VLAI
EPSS
VEX
Summary
BIRD through 2.0.7 does not provide functionality for password authentication of BGP peers. Because of this, products that use BIRD (which may, for example, include Tigera products in some configurations, as well as products of other vendors) may have been susceptible to route redirection for Denial of Service and/or Information Disclosure. NOTE: a researcher has asserted that the behavior is within Tigera’s area of responsibility; however, Tigera disagrees
Severity
6.8 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-01 15:15 UTC
CWE
- n/a
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.cyberark.com/resources/threat-researc… | x_refsource_MISC |
Impacted products
Date Public
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CVE-2019-16159 (GCVE-0-2019-16159)
Vulnerability from cvelistv5 – Published: 2019-09-09 14:34 – Updated: 2024-08-05 01:10
VLAI
EPSS
VEX
Summary
BIRD Internet Routing Daemon 1.6.x through 1.6.7 and 2.x through 2.0.5 has a stack-based buffer overflow. The BGP daemon's support for RFC 8203 administrative shutdown communication messages included an incorrect logical expression when checking the validity of an input message. Sending a shutdown communication with a sufficient message length causes a four-byte overflow to occur while processing the message, where two of the overflow bytes are attacker-controlled and two are fixed.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://gitlab.labs.nic.cz/labs/bird/commit/8388f… | x_refsource_MISC |
| https://gitlab.labs.nic.cz/labs/bird/commit/1657c… | x_refsource_MISC |
| http://trubka.network.cz/pipermail/bird-users/201… | x_refsource_MISC |
| http://trubka.network.cz/pipermail/bird-users/201… | x_refsource_MISC |
| http://trubka.network.cz/pipermail/bird-users/201… | x_refsource_MISC |
| http://bird.network.cz | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://seclists.org/bugtraq/2019/Sep/34 | mailing-listx_refsource_BUGTRAQ |
| https://www.debian.org/security/2019/dsa-4528 | vendor-advisoryx_refsource_DEBIAN |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
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