Out-of-bounds Read in Haxx Libcurl
CVE-2019-3823
libcurl versions from 7.34.0 to before 7.64.0 are vulnerable to a heap out-of-bounds read in the code handling the end-of-response for SMTP. If the buffer passed to `smtp_endofresp()` isn't NUL terminated and contains no character ending the parsed number, and `len` is set to 5, then the `strtol()` call reads beyond the allocated buffer. The read contents will not be returned to the caller.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.043 (90.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.043 · newest: 0.043 · change: 0.000
Affected products
- Haxx Libcurl
- NetApp Clustered Data Ontap
- Oracle Communications Operations Monitor — versions 3.4, 4.0
- Oracle HTTP Server — versions 12.2.1.3.0
- Oracle Secure Global Desktop — versions 5.4
- The Curl Project — versions 7.64.0
- Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
- Debian Linux — versions 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security.gentoo.org/glsa/201903-03 (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2019/dsa-4386 (vendor-advisory, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Exploit, Patch, Third Party Advisory, Issue Tracking)
- curl.haxx.se/docs/CVE-2019-3823.html (Patch, Vendor Advisory)
- security.netapp.com/advisory/ntap-20190315-0001/ (Exploit, Third Party Advisory)
- usn.ubuntu.com/3882-1/ (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/106950 (VDB Entry, Third Party Advisory, vdb-entry)
- lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89… (mailing-list)
- www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html (Patch, Third Party Advisory)
- www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
Frequently asked questions
- What is CVE-2019-3823?
- CVE-2019-3823 is a medium-severity vulnerability in Haxx Libcurl, classified under Out-of-bounds Read. CVSS score: 4.3/10. Published 2019-02-06.
- How severe is CVE-2019-3823?
- Medium severity. CVSS v3 base score is 4.3 out of 10.
- Is CVE-2019-3823 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.