CVE-2018-6789

Katalog CVE

CVSS 9.8 · Critical KEV · sudah dieksploitasi Dipakai ransomware EPSS 82,1%

Kerentanan Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') pada exim, debian linux +1 lainnya. Skor CVSS 3.1 9.8 (Critical) menurut NVD. Masuk katalog KEV CISA pada 3 November 2021, artinya sudah terbukti dieksploitasi. Tercatat dipakai dalam kampanye ransomware.

Deskripsi (NVD)

An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.

Rincian

Terbit di NVD

8 Februari 2018

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

9.8 (Critical), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

EPSS (30 hari)

82,1% peluang dieksploitasi; lebih tinggi dari 99,6% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama

Exim Buffer Overflow Vulnerability

Masuk KEV

3 November 2021

Tenggat CISA

3 Mei 2022 (untuk instansi federal AS)

Ransomware

Tercatat dipakai dalam kampanye ransomware

Tindakan wajib

Apply updates per vendor instructions.

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://exim.org/static/doc/security/CVE-2018-6789.txt advisory vendor
• https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1 patch
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-6789 pemerintah AS
• http://openwall.com/lists/oss-security/2018/02/10/2 mailing list · advisory pihak ketiga
• http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html exploit · advisory pihak ketiga · vdb entry
• http://www.openwall.com/lists/oss-security/2018/02/07/2 mailing list · advisory pihak ketiga
• http://www.securityfocus.com/bid/103049 broken link · advisory pihak ketiga · vdb entry
• http://www.securitytracker.com/id/1040461 broken link · advisory pihak ketiga · vdb entry
• https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/ exploit · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html mailing list · advisory pihak ketiga
• https://usn.ubuntu.com/3565-1/ advisory pihak ketiga
• https://www.debian.org/security/2018/dsa-4110 mailing list · advisory pihak ketiga
• https://www.exploit-db.com/exploits/44571/ exploit · advisory pihak ketiga · vdb entry
• https://www.exploit-db.com/exploits/45671/ exploit · advisory pihak ketiga · vdb entry