CVE-2026-45185

תיאור (מקור, אנגלית)

Exim before 4.99.3, in certain GnuTLS configurations, has a remotely reachable use-after-free in the BDAT body parsing path. It is triggered when a client sends a TLS close_notify mid-body during a CHUNKING transfer, followed by a final cleartext byte on the same TCP connection. This can lead to heap corruption. An unauthenticated network attacker exploiting this vulnerability could execute arbitrary code.

מדדים

CVSS 3.1

9.8 (CRITICAL) מקור הציון: CNA CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — סבירות ניצול

1% (אחוזון 100) נכון ל-3/8/2026

CWE

CWE-416

מוצרים מושפעים

exim: exim

קישורים

• https://code.exim.org/exim/wiki/wiki/EximSecurity Vendor Advisory
• https://exim.org Product
• https://exim.org/static/doc/security/CVE-2026-45185.txt Broken Link
• https://exim.org/static/doc/security/EXIM-Security-2026-05-01.1/ Release Notes
• https://news.ycombinator.com/item?id=48111748 Issue Tracking
• https://www.openwall.com/lists/oss-security/2026/05/12/4 Mailing ListThird Party Advisory
• https://xbow.com/blog/dead-letter-cve-2026-45185-xbow-found-rce-exim Third Party Advisory
• http://www.openwall.com/lists/oss-security/2026/05/12/25 Mailing ListThird Party Advisory