CVE-2009-2055

Cisco IOS XR: Border Gateway Protocol (BGP) Denial-of-Service

As of , CVE-2009-2055 in Cisco IOS XR is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch soon.

Exploited
Yes: CISA listed it on 25 March 2022
US federal deadline
15 April 202221 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.03Higher than 88% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
EPSS when listed
0.01 on 25 March 2022EPSS on the day CISA listed it.
Public exploit
None foundNeither Metasploit nor Exploit-DB lists one.
Fix
No vendor link in CISA's entry

What CISA says to do

Apply updates per vendor instructions.

CISA's required action

What the flaw is

Cisco IOS XR,when BGP is the configured routing feature, allows remote attackers to cause a denial-of-service (DoS).

CISA's description

Cisco IOS XR 3.4.0 through 3.8.1 allows remote attackers to cause a denial of service (session reset) via a BGP UPDATE message with an invalid attribute, as demonstrated in the wild on 17 August 2009.

The CVE record's description, from cisco

CVE published
19 August 2009
Assigned by
cisco
CVSS
5.9 Medium (CVSS 3.1, from CISA-ADP)
CWE-20
Improper Input Validation
CISA SSVC, exploitation
active
CISA SSVC, automatable
no
CISA SSVC, technical impact
partial

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.

IOS XR: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2022-20821Open PortCisco IOS XRPatch soon0.11
CVE-2020-3118Software Discovery Protocol Format StringCisco IOS XRPatch soon0.12
CVE-2010-3035Border Gateway Protocol (BGP) Denial-of-ServiceCisco IOS XRPatch soon0.06
CVE-2020-3566Software DVMRP Memory ExhaustionCisco IOS XRPatch soon0.04
CVE-2020-3569Software DVMRP Memory ExhaustionCisco IOS XRPatch soon0.03

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