CVE-2009-0751

Yaws < 1.80 - Denial of Service via Large Number of Headers

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2009-0751. PoCs published by Praveen Darshanam.

AI-analyzed exploit summary This Perl script exploits CVE-2009-0751 by sending a large number of HTTP headers to a Yaws server, causing a denial of service due to memory consumption and crash. It constructs a malicious HTTP request with exponentially increasing headers and sends it to the target server.

Description

Yaws before 1.80 allows remote attackers to cause a denial of service (memory consumption and crash) via a request with a large number of headers.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Praveen Darshanam · perldosmultiple
https://www.exploit-db.com/exploits/8148

This Perl script exploits CVE-2009-0751 by sending a large number of HTTP headers to a Yaws server, causing a denial of service due to memory consumption and crash. It constructs a malicious HTTP request with exponentially increasing headers and sends it to the target server.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Yaws before 1.80
No auth needed
Prerequisites: Network access to the Yaws server · Yaws server version < 1.80
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (8)

Core 8
Core References
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/33979
Third Party Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2009/0590
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2009/02/19/1
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/34239
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2009/dsa-1740
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/8148
Vendor Advisory x_refsource_confirm
http://yaws.hyber.org/
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/33834

Scores

EPSS 0.1040
EPSS Percentile 95.1%

Details

CWE
CWE-399
Status published
Products (27)
yaws/yaws 1.50
yaws/yaws 1.51
yaws/yaws 1.52
yaws/yaws 1.53
yaws/yaws 1.54
yaws/yaws 1.55
yaws/yaws 1.56
yaws/yaws 1.57
yaws/yaws 1.58
yaws/yaws 1.61
... and 17 more
Published Mar 02, 2009
Tracked Since Feb 18, 2026