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Cisco IOS BGP DoS
Published: 29.07.2009
Source: BUGTRAQ
SecurityVulns ID: 10112
Type: remote
Level: 6/10
Description: Few denial of service conditions on BGP updates with 4-bytes AS numbers.

Affected: CISCO : IOS 12.0
CISCO : IOS 12.1
CISCO : IOS 12.2
CISCO : IOS 12.3
CISCO : IOS 12.4
CISCO : IOS XE 2.1
CISCO : IOS XE 2.2
CISCO : IOS XE 2.3
CISCO : IOS XE 2.4
CVE: CVE-2009-2049 (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.)
CVE-2009-1168 (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, 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 (memory corruption and device reload) by using an RFC4271 peer to send an update with a long series of AS numbers, aka Bug ID CSCsy86021.)

Original document CISCO, Cisco Security Advisory: Cisco IOS Software Border Gateway Protocol 4-Byte Autonomous System Number Vulnerabilities (29.07.2009)

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