What’s Vulnerable › Vulnerabilities

CVE-2020-16117

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-07-29 · updated 2026-06-17
• Weakness: CWE-476

Description

In GNOME evolution-data-server before 3.35.91, a malicious server can crash the mail client with a NULL pointer dereference by sending an invalid (e.g., minimal) CAPABILITY line on a connection attempt. This is related to imapx_free_capability and imapx_connect_to_server.

Affected products

• Debian Linux: 9.0
• GNOME evolution-data-server: before 3.35.91 — fixed in 3.35.91

How to fix

Upgrade to a fixed version: GNOME evolution-data-server 3.35.91. Check the vendor advisory for mitigations.

References

• https://gitlab.gnome.org/GNOME/evolution-data-server/-/commit/2cc39592b532cf0dc994fd3694b8e6bf924c9ab5
• https://gitlab.gnome.org/GNOME/evolution-data-server/-/commit/627c3cdbfd077e59aa288c85ff8272950577f1d7
• https://gitlab.gnome.org/GNOME/evolution-data-server/-/issues/189
• https://lists.debian.org/debian-lts-announce/2020/08/msg00005.html
• https://gitlab.gnome.org/GNOME/evolution-data-server/-/commit/2cc39592b532cf0dc994fd3694b8e6bf924c9ab5
• https://gitlab.gnome.org/GNOME/evolution-data-server/-/commit/627c3cdbfd077e59aa288c85ff8272950577f1d7
• https://gitlab.gnome.org/GNOME/evolution-data-server/-/issues/189
• https://lists.debian.org/debian-lts-announce/2020/08/msg00005.html

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