Debian update for exim4



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-12783
CWE-ID CWE-125
Exploitation vector Network
Public exploit N/A
Vulnerable software
 exim4 (Debian package)
Operating systems & Components / Operating system package or component

Vendor Debian

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Out-of-bounds read

EUVDB-ID: #VU27959

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-12783

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in the SPA authenticator within auths/spa.c and auths/auth-spa.c. A remote attacker can bypass SPA/NTLM authentication.

Mitigation

Update exim4 package to one of the following versions: 4.89-2+deb9u7, 4.92-8+deb10u4.

Vulnerable software versions

exim4 (Debian package): 4.89-2+deb9u1~bpo8+1 - 4.92-8+deb10u3

CPE2.3 External links

https://www.debian.org/security/2020/dsa-4687


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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