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Fencer Vulns
high 7.5

CVE-2022-27781 json

libcurl provides the `CURLOPT_CERTINFO` option to allow applications torequest details to be returned about a server's certificate chain.Du…

published 2022-06-01 4 y ago modified 2026-10-14 25 d ago also EUVD-2022-32276 , JLSEC-2026-390

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

libcurl provides the `CURLOPT_CERTINFO` option to allow applications torequest details to be returned about a server's certificate chain.Due to an erroneous function, a malicious server could make libcurl built withNSS get stuck in a never-ending busy-loop when trying to retrieve thatinformation.

Patch / fix

  • julia CURL_jll 8.5.0+0
  • julia LibCURL_jll 7.83.1+0
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • curl Debian 14, Debian 13, Debian 12 7.83.1-1

debian advisories DEBIAN-CVE-2022-27781

  • curl Ubuntu 18.04 LTS 7.58.0-2ubuntu3.18
  • curl Ubuntu 20.04 LTS 7.68.0-1ubuntu2.11
  • curl Ubuntu 22.04 LTS 7.81.0-1ubuntu1.2
  • curl Ubuntu Pro 14.04 LTS 7.35.0-1ubuntu2.20+esm11
  • curl Ubuntu Pro 16.04 LTS 7.47.0-1ubuntu2.19+esm4

ubuntu advisories UBUNTU-CVE-2022-27781

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • jbcs-httpd24-curl jboss core services 1 7.86.0-2.el7jbcs
  • jbcs-httpd24-curl jboss core services 1 7.86.0-2.el8jbcs
  • jbcs-httpd24-httpd jboss core services 1 2.4.51-37.el7jbcs
  • jbcs-httpd24-httpd jboss core services 1 2.4.51-37.el8jbcs
  • jbcs-httpd24-libcurl jboss core services 1 7.86.0-2.el7jbcs
  • jbcs-httpd24-libcurl jboss core services 1 7.86.0-2.el8jbcs
  • jbcs-httpd24-mod_ssl jboss core services 1 1:2.4.51-37.el7jbcs
  • jbcs-httpd24-mod_ssl jboss core services 1 1:2.4.51-37.el8jbcs

red hat advisories RHSA-2022:8840

  • curl SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +7 more 7.60.0-150000.33.1
  • curl SLES for SAP 12 SP4, SLES 12 SP4-LTSS, OpenStack Cloud Crowbar 9 +1 more 7.60.0-4.38.1
  • curl SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLES 15 SP2-BCL +10 more 7.66.0-150200.4.33.1
  • curl SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 7.60.0-11.40.2
  • curl SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +4 more 7.37.0-37.76.1

suse advisories SUSE-SU-2022:2829-1SUSE-SU-2022:2813-1SUSE-SU-2022:1870-1SUSE-SU-2022:1805-1SUSE-SU-2022:1733-1

  • curl openSUSE Tumbleweed 7.83.1-1.1

opensuse advisories openSUSE-SU-2024:12062-1

  • curl Alpine 3.14, Alpine 3.13 7.79.1-r2
  • curl Alpine 3.15 7.80.0-r2
  • curl Alpine 3.24, Alpine 3.23, Alpine 3.22 +6 more 7.83.1-r0

alpine advisories ALPINE-CVE-2022-27781

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • curl CBL-Mariner 2.0 7.83.1-1

azure linux advisories AZL-9890

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

  • curl Arch Linux 7.83.1-1

arch linux advisories AVG-2706

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-27781 updated cvss 7.5

curl: CERTINFO never-ending busy-loop

  • Red Hat .NET Core 3.1 on Red Hat Enterprise Linux rh-dotnet31-curl, rh-dotnet31-libcurl Red Hat Enterprise Linux 6 curl, libcurl Red Hat Enterprise Linux 7 curl, libcurl
    affected: no fix planned “Out of support scope”
  • Red Hat Software Collections httpd24-curl, httpd24-libcurl
    affected: no fix available “Fix deferred”
  • Red Hat JBoss Core Services
    fixed: vendor fix RHSA-2022:8841
  • Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-curl 7.86.0-2.el7jbcs, jbcs-httpd24-libcurl 7.86.0-2.el7jbcs Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-curl 7.86.0-2.el8jbcs, jbcs-httpd24-libcurl 7.86.0-2.el8jbcs
    fixed: vendor fix RHSA-2022:8840
  • Red Hat Enterprise Linux 8 curl, libcurl, libcurl-minimal Red Hat Enterprise Linux 9 curl, libcurl, curl-minimal, libcurl-minimal Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-httpd 2.4.51-37.el7jbcs, jbcs-httpd24-mod_md 2.4.0-18.el7jbcs, jbcs-httpd24-apr-util 1.6.1-99.el7jbcs, jbcs-httpd24-mod_ssl 2.4.51-37.el7jbcs, jbcs-httpd24-nghttp2 1.43.0-11.el7jbcs, jbcs-httpd24-openssl 1.1.1k-13.el7jbcs, +22 more Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-httpd 2.4.51-37.el8jbcs, jbcs-httpd24-mod_md 2.4.0-18.el8jbcs, jbcs-httpd24-apr-util 1.6.1-99.el8jbcs, jbcs-httpd24-mod_ssl 2.4.51-37.el8jbcs, jbcs-httpd24-nghttp2 1.43.0-11.el8jbcs, jbcs-httpd24-openssl 1.1.1k-13.el8jbcs, +22 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-23-348-10 updated cvss 7.5

Siemens SIMATIC S7-1500

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.0, < 3.1.5
    affected: fixed in V3.1.5, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-23-194-01 updated cvss 7.5

Siemens RUGGEDCOM ROX

  • Siemens RUGGEDCOM ROX MX5000 <V2.16.0 Siemens RUGGEDCOM ROX MX5000RE <V2.16.0 Siemens RUGGEDCOM ROX RX1400 <V2.16.0 Siemens RUGGEDCOM ROX RX1500 <V2.16.0 Siemens RUGGEDCOM ROX RX1501 <V2.16.0 Siemens RUGGEDCOM ROX RX1510 <V2.16.0
    +5 more products
    Siemens RUGGEDCOM ROX RX1511 <V2.16.0 Siemens RUGGEDCOM ROX RX1512 <V2.16.0 Siemens RUGGEDCOM ROX RX1524 <V2.16.0 Siemens RUGGEDCOM ROX RX1536 <V2.16.0 Siemens RUGGEDCOM ROX RX5000 <V2.16.0
    affected: fixed in V2.16.0 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

2.90% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • hackerone.com https://hackerone.com/reports/1555441 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia CURL_jll
<8.5.0+0
8.5.0+0
julia LibCURL_jll
<7.83.1+0
7.83.1+0

Affected products

  • n/a https://github.com/curl/curl
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.