CVE-2020-12457 — Infinite Loop in Wolfssl

CWE-835 — Infinite LoopCWE-20 — Improper Input Validation4 documents4 sources
Severity
7.5HIGHNVD
EPSS
0.5%
top 35.48%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
WolfsslDebian Wolfssl
Timeline
PublishedAug 21
Latest updateMay 24

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages3 packages

▶debiandebian/wolfssl< wolfssl 4.5.0+dfsg-1 (bookworm)
▶NVDwolfssl/wolfssl< 4.5.0
▶Debianwolfssl/wolfssl< 4.5.0+dfsg-1+3

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

2
GHSA
GHSA-85m8-xxmw-3hpv: An issue was discovered in wolfSSL before 4↗2022-05-24
▶
OSV
CVE-2020-12457: An issue was discovered in wolfSSL before 4↗2020-08-21
▶

📋Vendor Advisories

1
Debian
CVE-2020-12457: wolfssl - An issue was discovered in wolfSSL before 4.5.0. It mishandles the change_cipher...↗2020
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CVE-2020-12457 — Infinite Loop in Wolfssl | cvebase