CVE-2015-7496
published 2015-11-24CVE-2015-7496: GNOME Display Manager (gdm) before 3.18.2 allows physically proximate attackers to bypass the lock screen by holding the Escape key.
PriorityP430high7.2CVSS 2.0
AVLACLAuNCCICAC
EPSS
0.41%
32.4th percentile
GNOME Display Manager (gdm) before 3.18.2 allows physically proximate attackers to bypass the lock screen by holding the Escape key.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | gdm3 | < gdm3 3.18.2-1 (bookworm) | gdm3 3.18.2-1 (bookworm) |
| fedoraproject | fedora | — | — |
| gnome | gnome_display_manager | <= 3.18.0 | — |
CVSS provenance
nvdv2.07.2HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C
osv7.2HIGH
vendor_debian7.2HIGH
vendor_redhat7.2HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Red Hat
gdm: Crash when holding Escape in log screen
vendor_redhat·2015-11-12·CVSS 7.2
CVE-2015-7496 [HIGH] CWE-364 gdm: Crash when holding Escape in log screen
gdm: Crash when holding Escape in log screen
GNOME Display Manager (gdm) before 3.18.2 allows physically proximate attackers to bypass the lock screen by holding the Escape key.
It was found that gdm could crash due to a signal handler dispatched to an invalid conversation. An attacker could crash gdm by holding the escape key when the screen is locked, possibly bypassing the locked screen.
Package: gdm (Red Hat Enterprise Linux 5) - Not affected
Package: gdm (Red Hat Enterprise Linux 6) - Not affected
Debian
CVE-2015-7496: gdm3 - GNOME Display Manager (gdm) before 3.18.2 allows physically proximate attackers ...
vendor_debian·2015·CVSS 7.2
CVE-2015-7496 [HIGH] CVE-2015-7496: gdm3 - GNOME Display Manager (gdm) before 3.18.2 allows physically proximate attackers ...
GNOME Display Manager (gdm) before 3.18.2 allows physically proximate attackers to bypass the lock screen by holding the Escape key.
Scope: local
bookworm: resolved (fixed in 3.18.2-1)
bullseye: resolved (fixed in 3.18.2-1)
forky: resolved (fixed in 3.18.2-1)
sid: resolved (fixed in 3.18.2-1)
trixie: resolved (fixed in 3.18.2-1)
GHSA
GHSA-qwh9-f2h4-mw38: GNOME Display Manager (gdm) before 3
ghsa_unreviewed·2022-05-14
CVE-2015-7496 [HIGH] GHSA-qwh9-f2h4-mw38: GNOME Display Manager (gdm) before 3
GNOME Display Manager (gdm) before 3.18.2 allows physically proximate attackers to bypass the lock screen by holding the Escape key.
OSV
CVE-2015-7496: GNOME Display Manager (gdm) before 3
osv·2015-11-24·CVSS 7.2
CVE-2015-7496 [HIGH] CVE-2015-7496: GNOME Display Manager (gdm) before 3
GNOME Display Manager (gdm) before 3.18.2 allows physically proximate attackers to bypass the lock screen by holding the Escape key.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2015-7496 gdm: Crash when holding Escape in log screen [fedora-all]
bugzilla·2015-11-18·CVSS 7.2
CVE-2015-7496 [HIGH] CVE-2015-7496 gdm: Crash when holding Escape in log screen [fedora-all]
CVE-2015-7496 gdm: Crash when holding Escape in log screen [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported versions of Fedora
Bugzilla
CVE-2015-7496 gdm: Crash when holding Escape in log screen
bugzilla·2015-11-18·CVSS 7.2
CVE-2015-7496 [HIGH] CVE-2015-7496 gdm: Crash when holding Escape in log screen
CVE-2015-7496 gdm: Crash when holding Escape in log screen
It was found that when running gnome session, user locks the machine (by pressing + l), presses Escape and holds, gdm will crash causing segmentation fault.
Upstream bug:
https://bugzilla.gnome.org/show_bug.cgi?id=758032
Upstream patches:
https://git.gnome.org/browse/gdm/commit/?id=5ac2246
https://git.gnome.org/browse/gdm/commit/?id=05e5fc2
Discussion:
Created gdm tracking bugs for this issue:
Affects: fedora-all [bug 1283281]
---
gdm-3.18.2-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 7
Via RHSA-2017:2128 https://access.redhat.com/errata/RHSA-2017:21
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172328.htmlhttp://www.openwall.com/lists/oss-security/2015/11/17/10http://www.openwall.com/lists/oss-security/2015/11/17/8https://access.redhat.com/errata/RHSA-2017:2128https://bugzilla.gnome.org/show_bug.cgi?id=758032https://download.gnome.org/sources/gdm/3.18/gdm-3.18.2.newshttp://lists.fedoraproject.org/pipermail/package-announce/2015-November/172328.htmlhttp://www.openwall.com/lists/oss-security/2015/11/17/10http://www.openwall.com/lists/oss-security/2015/11/17/8https://access.redhat.com/errata/RHSA-2017:2128https://bugzilla.gnome.org/show_bug.cgi?id=758032https://download.gnome.org/sources/gdm/3.18/gdm-3.18.2.news
2015-11-24
Published