Medium severity · published Jun 11, 2021
CVE-2021-22897
curl 7.61.0 through 7.76.1 suffers from exposure of data element to wrong session due to a mistake in the code for CURLOPT_SSL_CIPHER_LIST when libcurl is built to use the…
5.3
CVSS
4.3%
EPSS
No
On KEV
Description
curl 7.61.0 through 7.76.1 suffers from exposure of data element to wrong session due to a mistake in the code for CURLOPT_SSL_CIPHER_LIST when libcurl is built to use the Schannel TLS library. The selected cipher set was stored in a single "static" variable in the library, which has the surprising side-effect that if an application sets up multiple concurrent transfers, the last one that sets the ciphers will accidentally control the set used by all transfers. In a worst-case scenario, this weakens transport security significantly.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.3% · 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 ·
7.61.0 through 7.76.1 · source: vendor
CB
Cloud Backup · Netapp
All versions, or not specified · source: NVD
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
7.61.0 through 7.76.1 · source: NVD
ES
Essbase · Oracle
before 11.1.2.4.047; 21.0 before 21.3 · source: NVD
HF
H300e Firmware · Netapp
All versions, or not specified · source: NVD
HF
H300s Firmware · Netapp
All versions, or not specified · source: NVD
HF
H410s Firmware · Netapp
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-22897
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-22897
Patch
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
Patch
https://curl.se/docs/CVE-2021-22897.html
Patch
https://github.com/curl/curl/commit/bbb71507b7bab52002f9b1e0880bed6a32834511
Exploit
https://hackerone.com/reports/1172857
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210727-0007/
Patch
https://www.oracle.com//security-alerts/cpujul2021.html
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