Buffer overflow in Haxx Curl
CVE-2018-0500
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).
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.064 (93.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.064 · newest: 0.064 · change: -0.001
Affected products
- Haxx Curl
- Canonical Ubuntu Linux — versions 17.10, 18.04
- Curl Before 7.61.0 — versions curl before 7.61.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securitytracker.com/id/1041280 (VDB Entry, Third Party Advisory, vdb-entry)
- github.com/curl/curl/commit/ba1dbd78e5f1ed67c1b8d37ac89d90e5e330b628 (Patch, Third Party Advisory)
- curl.haxx.se/docs/adv_2018-70a2.html (Exploit, Patch, Vendor Advisory)
- security.gentoo.org/glsa/201807-04 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:2486 (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3710-1/ (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-0500?
- CVE-2018-0500 is a critical-severity vulnerability in Haxx Curl, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-07-11.
- How severe is CVE-2018-0500?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2018-0500 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.