Vulnerability · Published Aug 21, 2020 · Assigned by mitre
CVE-2020-12457
High 7.5
In plain English
A high-severity security flaw in the wolfssl package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 75% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.5%top 25.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
An issue was discovered in wolfSSL before 4.5.0. It mishandles the change_cipher_spec (CCS) message processing logic for TLS 1.3. If an attacker sends ChangeCipherSpec messages in a crafted way involving more than one in a row, the server becomes stuck in the ProcessReply() loop, i.e., a denial of service.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | wolfssl | 4.5.0+dfsg-1 | DEBIAN-CVE-2020-12457 |
| Debian:13 | wolfssl | 4.5.0+dfsg-1 | DEBIAN-CVE-2020-12457 |
Affected products (as reported)
References
- https://github.com/wolfSSL/wolfssl/pull/2927 x_refsource_MISC
- https://github.com/wolfSSL/wolfssl/releases/tag/v4.5.0-stable x_refsource_CONFIRM