Buffer Overflow in ISC BIND Leads to Potential Denial of Service Vulnerability
CVE-2016-2776

7.5HIGH

Key Information:

Vendor

Oracle
Status
Linux
Vendor
CVE Published:
28 September 2016

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 87%

What is CVE-2016-2776?

A flaw in the buffer.c file of ISC BIND versions prior to 9.9.9-P3, 9.10.4-P3, and 9.11.0rc3 fails to properly construct DNS response packets. This vulnerability creates an opportunity for remote attackers to send crafted DNS queries, leading to assertion failures that can cause the BIND daemon to exit unexpectedly, resulting in a denial of service. This issue could severely disrupt services relying on BIND for DNS management, highlighting the need for timely updates and patches.

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Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2016-2776
Created by infobyte

CVE-2016-2776
Created by KosukeShimofuji

References

http://www.securityfocus.com/bid/93188
vdb-entryx_refsource_BID
https://kb.isc.org/article/AA-01438
x_refsource_CONFIRM
https://kb.isc.org/article/AA-01419/0
x_refsource_CONFIRM

EPSS Score

87% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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