CVE-2019-3823
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in, but needs a user to act. Limited direct impact.
- Exploit odds
- 4.1% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 4.1% in the next 30 days (EPSS).
- Severity: 4.3 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 4.1% · EPSS, next 30 days
- Weakness
- CWE-125 · Out-of-bounds read
- Record status
- Modified
Affected
- Haxx Libcurl < 7.64.0
- Canonical Ubuntu Linux 14.04
- Canonical Ubuntu Linux 16.04
- Canonical Ubuntu Linux 18.04
- Canonical Ubuntu Linux 18.10
- Debian Linux 9.0
- Netapp Clustered Data Ontap
- Oracle Communications Operations Monitor 3.4
Attack profile CVSS 3.0 · 4.3
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Raw vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2019-3823.md and follow it. Check whether this project is affected by CVE-2019-3823. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3823
- https://curl.haxx.se/docs/CVE-2019-3823.html
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3823
- https://curl.haxx.se/docs/CVE-2019-3823.html
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
References
- http://www.securityfocus.com/bid/106950
- https://access.redhat.com/errata/RHSA-2019:3701
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3823
- https://cert-portal.siemens.com/productcert/pdf/ssa-936080.pdf
- https://curl.haxx.se/docs/CVE-2019-3823.html
- https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
- https://security.gentoo.org/glsa/201903-03
- https://security.netapp.com/advisory/ntap-20190315-0001/
- https://usn.ubuntu.com/3882-1/
- https://www.debian.org/security/2019/dsa-4386
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
- http://www.securityfocus.com/bid/106950
- https://access.redhat.com/errata/RHSA-2019:3701
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3823
- https://cert-portal.siemens.com/productcert/pdf/ssa-936080.pdf
- https://curl.haxx.se/docs/CVE-2019-3823.html
- https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
- https://security.gentoo.org/glsa/201903-03
- https://security.netapp.com/advisory/ntap-20190315-0001/
- https://usn.ubuntu.com/3882-1/
- https://www.debian.org/security/2019/dsa-4386
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html