CVE-2017-1000257
A buffer overrun flaw was found in the IMAP handler of libcurl. By tricking an unsuspecting user into connecting to a malicious IMAP server, an attacker could exploit this flaw to potentially cause information disclosure or crash the application.
Find out more about CVE-2017-1000257 from the MITRE CVE dictionary dictionary and NIST NVD.
CVSS v3 metrics
| CVSS3 Base Score | 4.8 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity Impact | None |
| Availability Impact | Low |
Red Hat Security Errata
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 7 (curl) | RHSA-2017:3263 | 2017-11-27 |
| Red Hat JBoss Core Services 1 | RHSA-2018:2486 | 2018-08-16 |
Affected Packages State
| Platform | Package | State |
|---|---|---|
| Red Hat Software Collections for Red Hat Enterprise Linux | httpd24-curl | Will not fix |
| Red Hat JBoss Web Server 3 | curl | Not affected |
| Red Hat Enterprise Linux 6 | curl | Not affected |
| Red Hat Enterprise Linux 5 | curl | Not affected |
| RHEV Manager 3 | mingw-virt-viewer | Not affected |
| .NET Core 2.0 on Red Hat Enterprise Linux | rh-dotnet20-curl | Will not fix |
| .NET Core 1.0 on Red Hat Enterprise Linux | rh-dotnetcore10-curl | Will not fix |
| .NET Core 1.0 on Red Hat Enterprise Linux | rh-dotnetcore11-curl | Will not fix |
Acknowledgements
Red Hat would like to thank the Curl project for reporting this issue. Upstream acknowledges Brian Carpenter and the OSS-Fuzz project as the original reporters.Mitigation
Switch off IMAP in `CURLOPT_PROTOCOLS`