CVE-2020-16117: debian debian_linux NULL Pointer Dereference
Vulnerability summary
CVE-2020-16117 is a medium (CVSS 5.9) NULL Pointer Dereference vulnerability in debian debian_linux. EPSS estimates a 2.12% chance of exploitation in the next 30 days, higher than 81.6% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 6 · Related 5Timeline
- 29-07-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · Red hatEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
2.12%
Chance of exploitation in the next 30 days
Percentile
82%
Versus all other CVEs
30-day change
0.00 pp
From 2.12% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (gitlab.gnome.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Redhat25 products
- evolution< 0:3.28.5-16.el8
- evolution-bogofilter< 0:3.28.5-16.el8
- evolution-bogofilter-debuginfo< 0:3.28.5-16.el8
- evolution-data-server< 0:3.28.5-15.el8
- evolution-data-server-debuginfo< 0:3.28.5-15.el8
Debian2 products
- evolution-data-server< 3.36.0-1 | < 3.22.7-1+deb9u2
- debian_linuxEOL9.0
Gnome1 product
- evolution-data-server< 3.35.91
Ubuntu1 product
- evolution-data-serverAll versions (No fix recorded)
4 vendors · 29 products
References
18 links- gitlab.gnome.org/GNOME/evolution-data-server/-/issues/189X Refsource MISCREPORTExploitVendor Advisory
- gitlab.gnome.org/GNOME/evolution-data-server/-/commit/2cc39592b532cf0dc994fd3694b8e6bf924c9ab5X Refsource MISCREPORTPatchVendor Advisory
- gitlab.gnome.org/GNOME/evolution-data-server/-/commit/627c3cdbfd077e59aa288c85ff8272950577f1d7X Refsource MISCREPORTRelease NotesVendor Advisory
lists.debian.org/debian-lts-announce/2020/08/msg00005.htmlMailing ListX Refsource MLISTThird Party Advisory
