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TI-2017-14572 Aliases CVE-2017-1000257GHSA-6x54-39w9-rqhw

An IMAP FETCH response line indicates the size of the returned data, in number of bytes.

Priority MEDIUM 54CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · High
Fix status
Partial Red Hat: 15 fixed, 4 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

An IMAP FETCH response line indicates the size of the returned data, in number of bytes. When that response says the data is zero bytes, libcurl would pass on that (non-existing) data with a pointer and the size (zero) to the deliver-data function. libcurl's deliver-data function treats zero as a magic number and invokes strlen() on the data to figure out the length. The strlen() is called on a heap based buffer that might not be zero terminated so libcurl might read beyond the end of it into whatever memory lies after (or just crash) and then deliver that to the application as if it was actually downloaded.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.06224 93rd percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 15 fixed, 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*7.20.0 – 7.56.0VulnerableHaxx
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
  • cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:* Versions 7.20.0 – 7.56.0 Vulnerable ·Haxx
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian

Remediation

Red Hat 3 advisories

  • RHSA-2018:3558 Released 2018-11-13 · Red Hat rating Moderate
    httpd24 security, bug fix, and enhancement update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) httpd24-curl-7.61.1-1.el6, httpd24-httpd-2.4.34-7.el6, httpd24-httpd-devel-2.4.34-7.el6 +11
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) httpd24-curl-7.61.1-1.el7, httpd24-httpd-2.4.34-7.el7, httpd24-httpd-devel-2.4.34-7.el7 +12
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) httpd24-curl-7.61.1-1.el7, httpd24-httpd-2.4.34-7.el7, httpd24-httpd-devel-2.4.34-7.el7 +12
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) httpd24-curl-7.61.1-1.el7, httpd24-httpd-2.4.34-7.el7, httpd24-httpd-devel-2.4.34-7.el7 +12
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) httpd24-curl-7.61.1-1.el7, httpd24-httpd-2.4.34-7.el7, httpd24-httpd-devel-2.4.34-7.el7 +12
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) httpd24-curl-7.61.1-1.el6, httpd24-httpd-2.4.34-7.el6, httpd24-httpd-devel-2.4.34-7.el6 +11
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) httpd24-curl-7.61.1-1.el7, httpd24-httpd-2.4.34-7.el7, httpd24-httpd-devel-2.4.34-7.el7 +12
  • RHSA-2018:2486 Released 2018-08-16 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.29 security update
    • Red Hat JBoss Core Services
  • RHSA-2017:3263 Released 2017-11-27 · Red Hat rating Moderate
    curl security update
    • Red Hat Enterprise Linux Client (v. 7) curl-7.29.0-42.el7_4.1, libcurl-7.29.0-42.el7_4.1
    • Red Hat Enterprise Linux Client Optional (v. 7) libcurl-devel-7.29.0-42.el7_4.1
    • Red Hat Enterprise Linux ComputeNode (v. 7) curl-7.29.0-42.el7_4.1, libcurl-7.29.0-42.el7_4.1
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libcurl-devel-7.29.0-42.el7_4.1
    • Red Hat Enterprise Linux Server (v. 7) curl-7.29.0-42.el7_4.1, libcurl-7.29.0-42.el7_4.1, libcurl-7.29.0-42.el7_4.1.ppc +2
    • Red Hat Enterprise Linux Workstation (v. 7) curl-7.29.0-42.el7_4.1, libcurl-7.29.0-42.el7_4.1, libcurl-devel-7.29.0-42.el7_4.1
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) curl-7.29.0-42.el7_4.1, libcurl-7.29.0-42.el7_4.1, libcurl-devel-7.29.0-42.el7_4.1

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
.NET Core 1.0 on Red Hat Enterprise LinuxAffectedNo fix planned: Out of support scope
.NET Core 1.1 on Red Hat Enterprise LinuxAffectedNo fix planned: Out of support scope
.NET Core 2.0 on Red Hat Enterprise LinuxAffectedNo fix planned: Out of support scope
.NET Core 2.1 on Red Hat Enterprise LinuxAffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2017:3263
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2017:3263
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2017:3263
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2017:3263
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2017:3263
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2017:3263
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2017:3263
Red Hat JBoss Core ServicesFixed RHSA-2018:2486
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4)Fixed RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5)Fixed RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:3558
Not affected: 4 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Virtualization 3
  • Red Hat JBoss Web Server 3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-1000257
  2. 2026-10-03 Alias added: GHSA-6x54-39w9-rqhw

References

Advisory 6

Sources

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