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
02 Description
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
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 4.11% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 90.5% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2019-02-06 20:00Z7 YR AGO
- Last updated
- 2026-04-15 20:52Z6 MO AGO
- Reserved
- 2019-01-03
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 4.3)
- CNA CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
- Weaknesses
- CWE-125Out-of-bounds ReadBase
- Data version
- 5.2
- Document digest
- 0101fbe8ba935af2059a782c12afdfe3fa699ea58ab4d0427265cd75018e48a1
05 Affected products
06 References
- security.gentoo.orgGLSA-201903-03https://security.gentoo.org/glsa/201903-03
- www.debian.orgDSA-4386https://www.debian.org/security/2019/dsa-4386
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3823
- curl.haxx.sehttps://curl.haxx.se/docs/CVE-2019-3823.html
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20190315-0001/
- usn.ubuntu.comUSN-3882-1https://usn.ubuntu.com/3882-1/
- www.securityfocus.com106950http://www.securityfocus.com/bid/106950
- lists.apache.org[infra-devnull] 20190404 [GitHub] [incubator-openwhisk-runtime-ballerina] falkzoll commented on issue #15: Update to new base image jdk8u202-b08_openj9-0.12.1.https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
- www.oracle.comhttps://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- www.oracle.comhttps://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
- access.redhat.comRHSA-2019:3701https://access.redhat.com/errata/RHSA-2019:3701
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-936080.pdf
07 Fixed in
Arch Linux
- curl Fixed in 7.64.0-1
- lib32-curl Fixed in 7.64.0-1
- lib32-libcurl-compat Fixed in 7.64.0-1
- lib32-libcurl-gnutls Fixed in 7.64.0-1
- libcurl-gnutls Fixed in 7.64.0-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
Debian 12
- curl Fixed in 7.64.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- curl Fixed in 7.64.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- curl Fixed in 7.64.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- curl Fixed in 7.35.0-1ubuntu2.20
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- curl Fixed in 7.47.0-1ubuntu2.12
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- curl Fixed in 7.58.0-2ubuntu3.6
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.