CVE-2009-2049

Severity: medium (CVSS 5.4 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-07-30 · updated 2026-06-16
Weakness: CWE-16

Description

Cisco IOS 12.0(32)S12 through 12.0(32)S13 and 12.0(33)S3 through 12.0(33)S4, 12.0(32)SY8 through 12.0(32)SY9, 12.2(33)SXI1 through 12.2(33)SXI2, 12.2XNC before 12.2(33)XNC2, 12.2XND before 12.2(33)XND1, and 12.4(24)T1; and IOS XE 2.3 through 2.3.1t and 2.4 through 2.4.0; when RFC4893 BGP routing is enabled, allows remote attackers to cause a denial of service (device reload) by using an RFC4271 peer to send a malformed update, aka Bug ID CSCta33973.

Affected products

Cisco IOS: 12.0(32)s12, 12.0(32)s13, 12.0(32)sy8, 12.0(32)sy9, 12.0(33)s3, 12.0(33)s4 (+5)
Cisco IOS XE: 2.3, 2.3.1t, 2.4, 2.4.0

References

http://secunia.com/advisories/36046
http://www.cisco.com/en/US/products/products_security_advisory09186a0080aea4c9.shtml
http://www.securityfocus.com/bid/35860
http://www.securitytracker.com/id?1022619
http://www.vupen.com/english/advisories/2009/2082
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6853
http://secunia.com/advisories/36046
http://www.cisco.com/en/US/products/products_security_advisory09186a0080aea4c9.shtml
http://www.securityfocus.com/bid/35860
http://www.securitytracker.com/id?1022619
http://www.vupen.com/english/advisories/2009/2082
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6853

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