Low severity · published Jun 11, 2021
CVE-2021-22898
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…
3.1
CVSS
4.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.5% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HT
https://github.com/curl/curl ·
7.7 through 7.76.1 · source: vendor
CC
Communications Cloud Native Core Binding Support Function · Oracle
1.11.0 · source: NVD
CC
CC
Communications Cloud Native Core Network Repository Function · Oracle
1.15.0; 1.15.1 · source: NVD
CC
Communications Cloud Native Core Network Slice Selection Function · Oracle
1.8.0 · source: NVD
CC
Communications Cloud Native Core Service Communication Proxy · Oracle
1.15.0 · source: NVD
CU
Curl · Haxx
7.7 through 7.76.1 · source: NVD
DL
Debian Linux · Debian
9.0 · source: NVD
ES
Essbase · Oracle
before 11.1.2.4.047; 21.0 before 21.3 · source: NVD
FE
Fedora · Fedoraproject
33; 34 · source: NVD
MS
Mysql Server · Oracle
before 5.7.34; 8.0.15 before 8.0.25 · source: NVD
SI
Sinec Infrastructure Network Services · Siemens
before 1.0.1.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-22898
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-22898
Mailing List
http://www.openwall.com/lists/oss-security/2021/07/21/4
Patch
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
Exploit
https://curl.se/docs/CVE-2021-22898.html
Patch
https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde
Exploit
https://hackerone.com/reports/1176461
Mailing List
https://lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c%40%3Cissues.guacamole.apache.org%3E
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