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CVE-2018-0500

33
FAUCET Score

CVE-2018-0500 describes a critical heap-based buffer overflow in Curl_smtp_escape_eob within curl versions 7.54.1 through 7.60.0, impacting canonical and haxx curl and Ubuntu Linux. This vulnerability, rated 9.8 CVSS (Critical), allows for remote exploitation with low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. While the EPSS score is low and it's not on the KEV catalog, there is currently no public exploit code available, nor has it garnered significant community or media attention.

Impacted Technologies

VendorProductVersion(s)CPE
>= 7.54.1, <= 7.60.0CPE matchmatch criteria
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
17.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
6.43%
Probability of exploitation in next 30 days
EPSS Percentile
93.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0643 is in the 88th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

github_advisorypatch availablevia nvd_reference
View patch
jitsipatch availablevia llm_extracted
Fixed in: 7.60.0
View patch
redhatpatch availablevia redhat_api
Product: Text-Only JBCS
View patch
sierra_wirelesspatch availablevia llm_extracted
Fixed in: 7.60.0
View patch

Vendor Advisories (3)

redhatCVE-2018-0500Moderate

curl: Heap-based buffer overflow in Curl_smtp_escape_eob() when uploading data over SMTP

Jul 11, 2018
sierra_wirelessllm-sierra_wireless-0433f2ee55e1e011HIGH

SMTP send heap buffer overflow

Jul 11, 2018
jitsillm-jitsi-e123f203712055b4HIGH

SMTP send heap buffer overflow

Jul 11, 2018

References

access.redhat.com / errata/RHSA-2018:2486
Third Party Advisory
curl.haxx.se / docs/adv_2018-70a2.html
ExploitPatchVendor Advisory
github.com / curl/curl/commit/ba1dbd78e5f1ed67c1b8d37ac89d90e5e330b628
PatchThird Party Advisory
security.gentoo.org / glsa/201807-04
Third Party Advisory
usn.ubuntu.com / 3710-1
Third Party Advisory
securitytracker.com / id/1041280
Third Party AdvisoryVDB Entry