What’s Vulnerable › Vulnerabilities

CVE-2017-9491

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-07-31 · updated 2026-06-17
• Weakness: CWE-200

Description

The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421733-160420a-CMCST); Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST); Cisco DPC3939B (firmware version dpc3939b-v303r204217-150321a-CMCST); Cisco DPC3941T (firmware version DPC3941_2.5s3_PROD_sey); and Arris TG1682G (eMTA&DOCSIS version 10.0.132.SIP.PC20.CT, software version TG1682_2.2p7s2_PROD_sey) devices does not set the secure flag for cookies in an https session to an administration application, which makes it easier for remote attackers to capture these cookies by intercepting their transmission within an http session.

Affected products

• Cisco Dpc3939 Firmware: dpc3939-p20-18-v303r20421733-160420a-cmcst, dpc3939-p20-18-v303r20421746-170221a-cmcst
• Cisco Dpc3939B Firmware: dpc3939b-v303r204217-150321a-cmcst
• Cisco Dpc3941T Firmware: dpc3941_2.5s3_prod_sey
• Commscope Arris Tg1682G Firmware: 10.0.132.sip.pc20.ct, tg1682_2.2p7s2_prod_sey

References

• https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-35.improper-cookie-flags.txt
• https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-35.improper-cookie-flags.txt

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