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CVE-2021-22898

LOW
3.1
CVSS Score
Published: June 11, 2021 at 03:49 PM UTC
Updated: October 14, 2026 at 11:16 AM UTC
12 products affected across 6 vendorsDebian LinuxFedoraMySQL Server

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Severity
LOW3.1
Exploit prediction
EPSS 5%
SSVC
PoC

Description

curl 7.7 through 7.76.1 suffers from an information disclosure when the `-t` command line option, known as `CURLOPT_TELNETOPTIONS` in libcurl, is used to send variable=content pairs to TELNET servers. Due to a flaw in the option parser for sending NEW_ENV variables, libcurl could be made to pass on uninitialized data from a stack based buffer to the server, resulting in potentially revealing sensitive internal information to the server using a clear-text network protocol.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
9.0
Fedora· Fedora Projectrpm
95%
3334
Curl· Haxx
95%
7.7 ≤ v ≤ 7.76.1
Communications Cloud Native Core Binding Support Function· Oracle
95%
1.11.0
Communications Cloud Native Core Network Function Cloud Native Environment· Oracle
95%
1.10.0
Communications Cloud Native Core Network Repository Function· Oracle
95%
1.15.01.15.1
Communications Cloud Native Core Network Slice Selection Function· Oracle
95%
1.8.0
Communications Cloud Native Core Service Communication Proxy· Oracle
95%
1.15.0
Essbase· Oracle
95%
v < 11.1.2.4.04721.0 ≤ v < 21.3
Affected range stops below 11.1.2.4.047, so it looks safe — our inference, not a vendor statement
Affected range stops below 21.3, so it looks safe — our inference, not a vendor statement
MySQL Server· Oraclenpm
95%
v < 5.7.348.0.15 ≤ v < 8.0.25
Affected range stops below 5.7.34, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.0.25, so it looks safe — our inference, not a vendor statement

References (15)

Mailing Listx_refsource_MLISTPatchThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2021/07/21/4
x_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
x_refsource_MISCExploitPatchVendor Advisory
Source: [email protected]
https://curl.se/docs/CVE-2021-22898.html
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde
x_refsource_MISCExploitIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://hackerone.com/reports/1176461
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c%40%3Cissues.guacamole.apache.org%3E
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2021/08/msg00017.html
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.1LOWCISA-ADP
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-200CWE-909

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