CVE-2017-5135

Description

Certain Technicolor devices have an SNMP access-control bypass, possibly involving an ISP customization in some cases. The Technicolor (formerly Cisco) DPC3928SL with firmware D3928SL-P15-13-A386-c3420r55105-160127a could be reached by any SNMP community string from the Internet; also, you can write in the MIB because it provides write properties, aka Stringbleed. NOTE: the string-bleed/StringBleed-CVE-2017-5135 GitHub repository is not a valid reference as of 2017-04-27; it contains Trojan horse code purported to exploit this vulnerability.

9.1

CVSS

Severity: Critical

CVSS 3.0 •

CVSS 2.0 •

EPSS 22.37% Top 5%

Third-Party Advisory securityfocus.com Third-Party Advisory github.io Third-Party Advisory reddit.com

Affected: n/a n/a

References

Link	Tags
https://stringbleed.github.io/	third party advisory technical description
http://www.securityfocus.com/bid/98092	vdb entry third party advisory
https://www.reddit.com/r/netsec/comments/67qt6u/cve_20175135_snmp_authentication_bypass/	press/media coverage third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-5135?: CVE-2017-5135 has been scored as a critical severity vulnerability.
How to fix CVE-2017-5135?: To fix CVE-2017-5135, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-5135 being actively exploited in the wild?: It is possible that CVE-2017-5135 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~22% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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