CVE-2018-0500: Buffer Overflow
First published: Mon Jul 02 2018(Updated: )
curl versions 7.54.1 through 7.60.0 are vulnerable to a heap-based buffer overflow in the Curl_smtp_escape_eob() function when uploading data over SMTP and using a reduced read buffer. An attacker could exploit this by convincing a user to use curl to upload data over SMTP with a reduced buffer to cause a crash or corrupt memory.
Credit: security@debian.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/curl | <7.61.0 | 7.61.0 |
| debian/curl | 7.74.0-1.3+deb11u13 7.74.0-1.3+deb11u11 7.88.1-10+deb12u7 7.88.1-10+deb12u5 8.9.1-2 8.10.0-2 | |
| curl | >=7.54.1<=7.60.0 | |
| Ubuntu Linux | =17.10 | |
| Ubuntu Linux | =18.04 | |
| Ubuntu | =17.10 | |
| Ubuntu | =18.04 |
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Reference Links
- http://www.securitytracker.com/id/1041280
- https://access.redhat.com/errata/RHSA-2018:2486
- https://curl.haxx.se/docs/adv_2018-70a2.html
- https://github.com/curl/curl/commit/ba1dbd78e5f1ed67c1b8d37ac89d90e5e330b628
- https://security.gentoo.org/glsa/201807-04
- https://usn.ubuntu.com/3710-1/
- https://launchpad.net/bugs/cve/CVE-2018-0500
- https://github.com/curl/curl/commit/e40e9d7f0decc79
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1456079&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1456079&action=edit
- https://github.com/curl/curl/commit/ba1dbd78e5f1e
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1600081
- https://bugzilla.redhat.com/show_bug.cgi?id=1597101
- https://security-tracker.debian.org/tracker/CVE-2018-0500
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0500
- https://nvd.nist.gov/vuln/detail/CVE-2018-0500
- https://ubuntu.com/security/CVE-2018-0500
Frequently Asked Questions
What is the severity of CVE-2018-0500?
CVE-2018-0500 is classified as a medium severity vulnerability due to the potential for exploitation via a heap-based buffer overflow.
How do I fix CVE-2018-0500?
To fix CVE-2018-0500, update curl to version 7.61.0 or later for Red Hat or version 7.74.0-1.3+deb11u13 or later for Debian.
Which versions of curl are affected by CVE-2018-0500?
CVE-2018-0500 affects curl versions from 7.54.1 up to 7.60.0 inclusive.
What types of attacks can exploit CVE-2018-0500?
An attacker could exploit CVE-2018-0500 by convincing a victim to upload data over SMTP using a vulnerable version of curl with a reduced read buffer.
Is there a specific requirement for exploiting CVE-2018-0500?
Exploitation of CVE-2018-0500 requires the victim to use curl with a reduced read buffer while uploading data over an SMTP server.
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