Information disclosure in Haxx Curl
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 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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.045 (91.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.044 · newest: 0.045 · change: +0.001
Affected products
- Haxx Curl
- Oracle Communications Cloud Native Core Binding Support Function — versions 1.11.0
- Oracle Communications Cloud Native Core Network Function Environment — versions 1.10.0
- Oracle Communications Cloud Native Core Network Repository Function — versions 1.15.0, 1.15.1
- Oracle Communications Cloud Native Core Network Slice Selection Function — versions 1.8.0
- Oracle Communications Cloud Native Core Service Communication Proxy — versions 1.15.0
- Oracle Essbase
- Oracle MySQL Server
- Siemens Sinec Infrastructure Network Services
- Splunk Universal Forwarder — versions 9.1.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- hackerone.com/reports/1176461 (Exploit, Patch, Third Party Advisory, Issue Tracking)
- curl.se/docs/CVE-2021-22898.html (Exploit, Patch, Vendor Advisory)
- github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde (Patch, Third Party Advisory)
- lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041… (mailing-list, Mailing List, Third Party Advisory)
- www.oracle.com//security-alerts/cpujul2021.html (Patch, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/07/21/4 (mailing-list, Patch, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/08/msg00017.html (mailing-list, Mailing List, Third Party Advisory)
- www.oracle.com/security-alerts/cpujan2022.html (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-22898?
- CVE-2021-22898 is a low-severity vulnerability in Haxx Curl, classified under Information Disclosure. CVSS score: 3.1/10. Published 2021-06-11.
- How severe is CVE-2021-22898?
- Low severity. CVSS v3 base score is 3.1 out of 10.
- Is CVE-2021-22898 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.