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CVE-2015-5694: Designate does not enforce the DNS protocol limit concerning record set sizes

6.5

CVSS Score
3.1

Basic Information

EPSS Score
0.75238%
Published
5/24/2022
Updated
11/26/2024
KEV Status
No
Technology
TechnologyPython

Technical Details

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Package NameEcosystemVulnerable VersionsFirst Patched Version
designatepip= 2015.1.0b2

Vulnerability Intelligence
Miggo AIMiggo AI

Miggo AIRoot Cause Analysis

The vulnerability stems from improper handling of DNS record set sizes during response generation. The CWE-835 (infinite loop) and advisory descriptions explicitly mention the mDNS component entering an infinite loop when processing oversized records. The '_do_process_query' method in the mdns handler is the logical point where DNS query processing and response rendering occur. The absence of size checks and packet splitting logic in this function would directly cause the infinite loop described in CVE-2015-5694. While the exact code isn't shown, the component (designate-mdns) and attack pattern match this function's responsibilities.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

**si*n*t* *o*s not *n*or** t** *NS proto*ol limit *on**rnin* r**or* s*t siz*s

Reasoning

T** vuln*r**ility st*ms *rom improp*r **n*lin* o* *NS r**or* s*t siz*s *urin* r*spons* **n*r*tion. T** *W*-*** (in*init* loop) *n* **visory **s*riptions *xpli*itly m*ntion t** m*NS *ompon*nt *nt*rin* *n in*init* loop w**n pro**ssin* ov*rsiz** r**or*s