CVE-2018-0500: canonical ubuntu_linux Out-of-bounds Write
Vulnerability summary
CVE-2018-0500 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in canonical ubuntu_linux. EPSS estimates a 6.35% chance of exploitation in the next 30 days, higher than 93.5% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 2 · Related 1Timeline
- 11-07-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
Curl_smtp_escape_eob in lib/smtp.c in curl 7.54.1 to and including curl 7.60.0 has a heap-based buffer overflow that might be exploitable by an attacker who can control the data that curl transmits over SMTP with certain settings (i.e., use of a nonstandard --limit-rate argument or CURLOPT_BUFFERSIZE value).
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
6.35%
Chance of exploitation in the next 30 days
Percentile
94%
Versus all other CVEs
30-day change
0.00 pp
From 6.35% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (curl.haxx.se)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Alpine1 product
- curl≥ 7.54.1, < 7.61.0-r0
Canonical1 product
- ubuntu_linuxEOL17.10 | 18.04
Debian1 product
- curl< 7.61.0-1
Haxx1 product
- curl≥ 7.54.1, ≤ 7.60.0
Suse1 product
- curl&distro=SUSE Linux Enterprise Module for Basesystem 15< 7.60.0-3.6.4
Ubuntu1 product
- curl< 7.58.0-2ubuntu3.2
6 vendors · 6 products
References
14 links- github.com/curl/curl/commit/ba1dbd78e5f1ed67c1b8d37ac89d90e5e330b628X Refsource CONFIRMPatchThird Party Advisory
