Exploited vulnerability · CISA KEV

Is CVE-2010-3035 exploited? Yes: in CISA KEV since 25 Mar 2022

Gociux · Cisco IOS XR · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2010-3035, Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 25 Mar 2022, 4225 days after it was published. It affects Cisco IOS XR. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 25 Mar 2022

ransomwareNot knownno confirmed use

EPSStop 10%more likely than most to be exploited

severity7.5CVSS 3.1 · high

US federal due15 Apr 2022BOD 22-01 deadline

What it is

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

Vendor	Cisco (103 exploited CVEs in KEV)
Product	IOS XR
Vulnerability	Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability
Weakness	CWE-20
Published	30 Aug 2010
Added to KEV	25 Mar 2022
Reported by (CNA)	cisco

What to do

Check whether you run it. Look for IOS XR in your asset inventory, including appliances and cloud images. Stack check lists every exploited Cisco CVE at once.
Apply the fix. Apply updates per vendor instructions.
If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 30 Aug 2010.
Get told next time. Email alerts when CISA adds a CVE for Cisco.

Other exploited CVEs in IOS XR

CVE-2022-20821: Cisco IOS XR Open Port Vulnerability (23 May 2022)
CVE-2009-2055: Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability (25 Mar 2022)
CVE-2020-3118: Cisco IOS XR Software Discovery Protocol Format String Vulnerability (3 Nov 2021)
CVE-2020-3566: Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability (3 Nov 2021)
CVE-2020-3569: Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability (3 Nov 2021)

References

nvd.nist.gov/vuln/detail/CVE-2010-3035

Questions

Is CVE-2010-3035 being exploited?

Yes. CISA added CVE-2010-3035 to the Known Exploited Vulnerabilities catalog on 25 Mar 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2010-3035 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2010-3035?

Apply updates per vendor instructions. Check Cisco's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected IOS XR and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in March 2022 · Cisco scorecard · act-now radar.

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