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Public proof of conceptFix available

CVE-2025-0725

A public proof of concept exists; no exploitation attested.

  • Published2025-02-05
  • Fixed in8.12.0
  • WeaknessCWE-120

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

When libcurl is asked to perform automatic gzip decompression of content-encoded HTTP responses with the `CURLOPT_ACCEPT_ENCODING` option, **using zlib 1.2.0.3 or older**, an attacker-controlled integer overflow would make libcurl perform a buffer overflow.

Timeline

dates in UTC
  1. 2025-02-0510:15CVE publishedNVD

Versions per branch

NVD
Haxx curlversion to verify
BranchAffectedFixed in
8.12≥ 7.10.5, < 8.12.08.12.0
Haxx libcurlversion to verify
BranchAffectedFixed in
8.12≥ 7.10.5, < 8.12.08.12.0
Netapp hci baseboard management controller
BranchAffectedFixed in
—all versionsno fix published

5 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As curl, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • curlother versions: not affected
    Affected
    • ≥ 8.11.1, ≤ 8.11.1no fix statedsemver
    • ≥ 8.11.0, ≤ 8.11.0no fix statedsemver
    • ≥ 8.10.1, ≤ 8.10.1no fix statedsemver
    • ≥ 8.10.0, ≤ 8.10.0no fix statedsemver
    • ≥ 8.9.1, ≤ 8.9.1no fix statedsemver
    • ≥ 8.9.0, ≤ 8.9.0no fix statedsemver
    • ≥ 8.8.0, ≤ 8.8.0no fix statedsemver
    • ≥ 8.7.1, ≤ 8.7.1no fix statedsemver

    154 more version lines in the CVE record.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2025-02-05

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • curlWolfiall versions · fixed in 8.12.0-r0
  • curlSUSE:Manager Server 4.3all versions · fixed in 8.0.1-150400.5.62.1
  • curlSUSE:Linux Micro 6.0all versions · fixed in 8.6.0-6.1
  • curlSUSE:Linux Enterprise Server LTSS Extended Security 12 SP5all versions · fixed in 8.0.1-11.105.1
  • curlSUSE:Linux Enterprise Server for SAP Applications 15 SP3all versions · fixed in 7.66.0-150200.4.84.1
  • curlSUSE:Linux Enterprise Server 15 SP5-LTSSall versions · fixed in 8.0.1-150400.5.62.1
  • curlSUSE:Linux Enterprise Server 15 SP4-LTSSall versions · fixed in 8.0.1-150400.5.62.1
  • curlSUSE:Linux Enterprise Server 15 SP3-LTSSall versions · fixed in 7.66.0-150200.4.84.1

56 more package ranges on OSV.dev

Vendor advisories

  • CVE-2025-0725 Red Hat Product Security

    libcurl: Buffer Overflow in libcurl via zlib Integer Overflow

  • ICSA-26-043-06 CISA16 known affected

    Siemens SINEC OS

    RUGGEDCOM RST2428P (6GK6242-6PA00) · SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family · SCALANCE XCH328 (6GK5328-4TS01-2EC2) · +13 more

  • SSA-089022 Siemens ProductCERT16 known affected

    SSA-089022: Multiple Vulnerabilities in Third-Party Components in SINEC OS before V3.3

    RUGGEDCOM RST2428P (6GK6242-6PA00) · SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family · SCALANCE XCH328 (6GK5328-4TS01-2EC2) · +13 more

  • ICSA-23-348-10 CISA5 known affected

    Siemens SIMATIC S7-1500

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) · SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) · +2 more

  • SSA-398330 Siemens ProductCERT5 known affected

    SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= V3.1.0 < V3.1.5 · SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= V3.1.0 < V3.1.5 · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= V3.1.0 < V3.1.5 · +2 more

Full record on NVD

Fix

  1. Update Haxx curl to 8.12.0
  2. Vendor fix Siemens ProductCERT SSA-089022 · 14 productsUpdate to V3.3 or later version
  3. Vendor fix Siemens ProductCERT SSA-089022 · 1 productSee Section Additional Information.
  4. Vendor fix CISA ICSA-26-043-06 · 14 productsUpdate to V3.3 or later version
  5. Vendor fix CISA ICSA-26-043-06 · 1 productSee Section Additional Information.
  6. Vendor fix CISA ICSA-23-348-10 · 5 productsUpdate to V3.1.5 or later version
  7. Vendor fix Siemens ProductCERT SSA-398330 · 1 productUpdate to V3.1.5 or later version

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Published
2025-02-05
Last Modified
2026-10-15
NVD status
Modified
GitHub Advisory
GHSA-vvqh-cqpj-5537

Frequently asked questions

What is CVE-2025-0725?

When libcurl is asked to perform automatic gzip decompression of content-encoded HTTP responses with the `CURLOPT_ACCEPT_ENCODING` option, **using zlib 1.2.0.3 or older**, an attacker-controlled integer overflow would make libcurl perform a buffer overflow.

Is CVE-2025-0725 actively exploited?

A proof-of-concept exploit exists for CVE-2025-0725, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2025-0725?

CVE-2025-0725 has a CVSS v3 base score of 7.3 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

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