TI-2011-02901 Aliases CVE-2011-3273 GHSA-c35x-v8hf-66rw

Memory leak in Cisco IOS 15.0 through 15.1, when IPS or Zone-Based Firewall (aka ZBFW) is…

LOW 38CWE-399Published 2011-10-03 · Updated 2024-09-17

Key facts

Attack vector: Network
Privileges required: None
User interaction: — Not recorded in CVSS 2.0
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Complete
Fix status: No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.

Summary

Memory leak in Cisco IOS 15.0 through 15.1, when IPS or Zone-Based Firewall (aka ZBFW) is configured, allows remote attackers to cause a denial of service (memory consumption or device crash) via vectors that trigger many session creation flows, aka Bug ID CSCti79848.

Why it matters now

EPSS 0.0177 78th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 11

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:ios:15.0:::::::*	15.0	Vulnerable	Cisco
cpe:2.3:o:cisco:ios:15.0m:::::::*	15.0m	Vulnerable	Cisco
cpe:2.3:o:cisco:ios:15.0sg:::::::*	15.0sg	Vulnerable	Cisco
cpe:2.3:o:cisco:ios:15.0xa:::::::*	15.0xa	Vulnerable	Cisco
cpe:2.3:o:cisco:ios:15.0xo:::::::*	15.0xo	Vulnerable	Cisco
cpe:2.3:o:cisco:ios:15.1:::::::*	15.1	Vulnerable	Cisco
cpe:2.3:o:cisco:ios:15.1gc:::::::*	15.1gc	Vulnerable	Cisco
cpe:2.3:o:cisco:ios:15.1m:::::::*	15.1m	Vulnerable	Cisco
cpe:2.3:o:cisco:ios:15.1s:::::::*	15.1s	Vulnerable	Cisco
cpe:2.3:o:cisco:ios:15.1t:::::::*	15.1t	Vulnerable	Cisco

cpe:2.3:o:cisco:ios:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·Cisco
cpe:2.3:o:cisco:ios:15.0m:*:*:*:*:*:*:* Versions 15.0m Vulnerable ·Cisco
cpe:2.3:o:cisco:ios:15.0sg:*:*:*:*:*:*:* Versions 15.0sg Vulnerable ·Cisco
cpe:2.3:o:cisco:ios:15.0xa:*:*:*:*:*:*:* Versions 15.0xa Vulnerable ·Cisco
cpe:2.3:o:cisco:ios:15.0xo:*:*:*:*:*:*:* Versions 15.0xo Vulnerable ·Cisco
cpe:2.3:o:cisco:ios:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·Cisco
cpe:2.3:o:cisco:ios:15.1gc:*:*:*:*:*:*:* Versions 15.1gc Vulnerable ·Cisco
cpe:2.3:o:cisco:ios:15.1m:*:*:*:*:*:*:* Versions 15.1m Vulnerable ·Cisco
cpe:2.3:o:cisco:ios:15.1s:*:*:*:*:*:*:* Versions 15.1s Vulnerable ·Cisco
cpe:2.3:o:cisco:ios:15.1t:*:*:*:*:*:*:* Versions 15.1t Vulnerable ·Cisco

Show 1 more CPE

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:ios:15.1xb:::::::*	15.1xb	Vulnerable	Cisco

cpe:2.3:o:cisco:ios:15.1xb:*:*:*:*:*:*:* Versions 15.1xb Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2011-3273
2026-10-03 Alias added: GHSA-c35x-v8hf-66rw

References

Advisory 1

20110928 Cisco IOS Software IPS and Zone-Based Firewall Vulnerabilities

Other 1

http://tools.cisco.com/security/center/viewAlert.x?alertId=24123

TI-2018-00138 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
TI-2017-09019 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
TI-2017-04499 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8

See all 617 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences