cURL and libcurl 7.10.6 through 7.41.0 does not properly re-use NTLM connections, which allows remote attackers to connect as other users vi
Noroxi assessment
Priority: Monitor (action score 23/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 11.1% (FIRST EPSS); higher than 95.9% of all records.
- No special conditions are required; it is repeatable.
- Fixed version: curl (Debian:12) 7.42.0-1; curl (Debian:6.0) 7.21.0-2.1+squeeze12; curl (Debian:7) 7.26.0-1+wheezy13.
Low priority for now. Upgrade to curl (Debian:12) 7.42.0-1; curl (Debian:6.0) 7.21.0-2.1+squeeze12; curl (Debian:7) 7.26.0-1+wheezy13 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
cURL and libcurl 7.10.6 through 7.41.0 does not properly re-use NTLM connections, which allows remote attackers to connect as other users via an unauthenticated request, a similar issue to CVE-2014-0015.
- Published
- Apr 24, 2015
- Updated
- Jun 16, 2026
- EPSS
- 11.1% · 95th percentile
- CWE
- CWE-264
Report tools
Action score
23
Monitor
Low priority for now.
- CVSS
- 20 / 40 · 5.0 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 3 / 30 · 11.1%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| haxx | curl | cpe:2.3:a:haxx:curl |
| haxx | libcurl | cpe:2.3:a:haxx:libcurl |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| hp | system management homepage | cpe:2.3:a:hp:system_management_homepage |
| apple | mac os x | cpe:2.3:o:apple:mac_os_x |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apple mac os xup to 10.9.5 inclusive
- apple mac os x10.10.0
- apple mac os x10.10.1
- apple mac os x10.10.2
- apple mac os x10.10.3
- apple mac os x10.10.4
- canonical ubuntu linux12.04
- canonical ubuntu linux14.04
- canonical ubuntu linux14.10
- canonical ubuntu linux15.04
- debian debian linux7.0
- haxx curl7.10.6
- haxx curl7.10.7
- haxx curl7.10.8
- haxx curl7.11.0
- haxx curl7.11.1
- haxx curl7.11.2
- haxx curl7.12.0
- haxx curl7.12.1
- haxx curl7.12.2
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | curl | before 7.42.0-1 | 7.42.0-1 |
| Debian:6.0 | curl | before 7.21.0-2.1+squeeze12 | 7.21.0-2.1+squeeze12 |
| Debian:7 | curl | before 7.26.0-1+wheezy13 | 7.26.0-1+wheezy13 |
| Debian:8 | curl | before 7.38.0-4+deb8u1 | 7.38.0-4+deb8u1 |
| openSUSE:Tumbleweed | curl | before 7.51.0-1.1 | 7.51.0-1.1 |
| Red Hat:enterprise_linux:6::client | curl | before 0:7.19.7-46.el6 | 0:7.19.7-46.el6 |
| Red Hat:enterprise_linux:6::client | curl-debuginfo | before 0:7.19.7-46.el6 | 0:7.19.7-46.el6 |
| Red Hat:enterprise_linux:6::client | libcurl | before 0:7.19.7-46.el6 | 0:7.19.7-46.el6 |
| Red Hat:enterprise_linux:6::client | libcurl-devel | before 0:7.19.7-46.el6 | 0:7.19.7-46.el6 |
| Red Hat:enterprise_linux:7::client | curl | before 0:7.29.0-25.el7 | 0:7.29.0-25.el7 |
| Red Hat:enterprise_linux:7::client | curl-debuginfo | before 0:7.29.0-25.el7 | 0:7.29.0-25.el7 |
| Red Hat:enterprise_linux:7::client | libcurl | before 0:7.29.0-25.el7 | 0:7.29.0-25.el7 |
| Red Hat:enterprise_linux:7::client | libcurl-devel | before 0:7.29.0-25.el7 | 0:7.29.0-25.el7 |
| SUSE:Linux Enterprise Desktop 12 | curl | before 7.37.0-15.1 | 7.37.0-15.1 |
Same product
haxx: all recordsOther highest-scoring records for the same primary product.
- CVE-2021-22901curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session t51Plan
- CVE-2023-38039When curl retrieves an HTTP response, it stores the incoming headers so that
they can be accessed later via the libcurl headers API.47Plan
- CVE-2024-2398HTTP/2 push headers memory-leak45Plan
Published before and after this one in the same product
- ← EarlierCVE-2014-3613Nov 18, 2014 · cURL and libcurl before 7.38.0 does not properly handle IP addresses in cookie domain names, which allows remote attackers to set cookies fo22Monitor
- ← EarlierCVE-2014-3620Nov 18, 2014 · cURL and libcurl before 7.38.0 allow remote attackers to bypass the Same Origin Policy and set cookies for arbitrary sites by setting a cook21Monitor
- Later →CVE-2015-3236Jun 22, 2015 · cURL and libcurl 7.40.0 through 7.42.1 send the HTTP Basic authentication credentials for a previous connection when reusing a reset (curl_e22Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:curl | 7.42.0-1 · Debian:12 | Package registry (OSV) |
| opensuse:curl | 7.51.0-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:curl | 0:7.19.7-46.el6 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:curl-debuginfo | 0:7.19.7-46.el6 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:libcurl | 0:7.19.7-46.el6 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:libcurl-devel | 0:7.19.7-46.el6 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| suse:curl | 7.37.0-15.1 · SUSE:Linux Enterprise Desktop 12 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- P · data or configuration can be modified
- Availability
- none
- Attack complexity
- Low
- Confidentiality impact
- None
- Integrity impact
- P
- Availability impact
- None
Weakness class (CWE)
CWE-264 · Permissions, Privileges, and Access ControlsCVSS vector
AV:N/AC:L/Au:N/C:N/I:P/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- curl.haxx.se/docs/adv_20150422A.html
- kb.juniper.net/InfoCenter/index?page=content&id=JSA10743
- lists.apple.com/archives/security-announce/2015/Aug/msg00001.html
- lists.fedoraproject.org/pipermail/package-announce/2015-April/155957.html
- lists.fedoraproject.org/pipermail/package-announce/2015-April/156250.html
- lists.fedoraproject.org/pipermail/package-announce/2015-May/156945.html
- lists.fedoraproject.org/pipermail/package-announce/2015-May/157017.html
- lists.fedoraproject.org/pipermail/package-announce/2015-May/157188.html
- lists.opensuse.org/opensuse-updates/2015-04/msg00057.html
- marc.info/?l=bugtraq&m=145612005512270&w=2
- rhn.redhat.com/errata/RHSA-2015-1254.html
- www.debian.org/security/2015/dsa-3232
- www.mandriva.com/security/advisories?name=MDVSA-2015:219
- www.mandriva.com/security/advisories?name=MDVSA-2015:220
- www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- www.securityfocus.com/bid/74299
- www.securitytracker.com/id/1032232
- www.ubuntu.com/usn/USN-2591-1
Vendor advisories and official records. Exploit/PoC links are deliberately left out.