CVE-2021-22898
No known exploitation. EPSS puts it in the 91st percentile. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
4.5% chance of exploitation activity in the next 30 days, which ranks it in the 91st percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
6 events over 1840 days, from the signal feeds we watch.
- OpenVAS check added
- Patch availablerecord updated
- Publishedweakness classified, att&ck mapped
Affected products
- communications cloud native core binding support functionCommunications
- communications cloud native core network function cloud native environmentDatabases / data-warehouse-analytics
- communications cloud native core network repository functionDatabases / data-warehouse-analytics
- communications cloud native core network slice selection functionCommunications
- communications cloud native core service communication proxyNetworking Infrastructure / router-switch
- essbaseDatabases / data-warehouse-analytics
- mysql serverDatabases / relational
- SUSE Linux Enterprise Server for SAP ApplicationsOperating Systems / linux-distro
- SUSE Linux Enterprise Point of SaleOperating Systems / linux-distro
- SUSE Linux Enterprise Software Development KitOperating Systems / linux-distro
- SUSE Linux Enterprise High Performance ComputingOperating Systems / linux-distro
- OpenSUSE LeapOperating Systems / linux-distro
- SUSE MicroOSOperating Systems / linux-distro
And 10 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Scored 3.1 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction RequiredA user must click a link, open a file, or perform some action
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality LowSome restricted information is disclosed, but limited in scope
- Integrity NoneNo integrity impact
- Availability NoneNo availability impact
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
- hackerone.com/reports/1176461
- curl.se/docs/CVE-2021-22898.html
- github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde
And 34 more references. See all after sign-in
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