Integer Overflow Vulnerability in libcurl Affecting HTTP Response Decompression
CVE-2025-0725

7.3HIGH

Key Information:

Vendor

Curl

Status
Curl
Vendor
CVE Published:
5 February 2025

What is CVE-2025-0725?

An integer overflow vulnerability exists in libcurl when handling automatic gzip decompression of HTTP responses for specific versions of zlib. If libcurl is configured with the CURLOPT_ACCEPT_ENCODING option and uses zlib version 1.2.0.3 or older, an attacker may exploit this flaw to manipulate the input, leading to a buffer overflow condition. This could potentially allow for unauthorized access or execution of arbitrary code within the affected application.

Affected Version(s)

curl 8.11.1

curl 8.11.0

curl 8.10.1

References

https://curl.se/docs/CVE-2025-0725.json
https://curl.se/docs/CVE-2025-0725.html
https://hackerone.com/reports/2956023

CVSS V3.1

Score:
7.3
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

z2_
Daniel Stenberg
.
CVE-2025-0725 : Integer Overflow Vulnerability in libcurl Affecting HTTP Response Decompression