CVE-2017-11124

libxar.so in xar 1.6.1 has a NULL pointer dereference in the xar_unserialize function in archive.c.

9.8 CriticalFix available

libxar.so in xar 1.6.1 has a NULL pointer dereference in the xar_unserialize function in archive.c.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

1.95%Up 1.1 points since Apr 14, 2021

What each source reports

NVD Score used 9.8

libxar.so in xar 1.6.1 has a NULL pointer dereference in the xar_unserialize function in archive.c.

Record: CVE-2017-11124
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-476
Updated: 2026-11-02

CVE List No score

libxar.so in xar 1.6.1 has a NULL pointer dereference in the xar_unserialize function in archive.c.

Record: CVE-2017-11124
Updated: 2026-11-02

EUVDEUVD-2017-2761 No score

libxar.so in xar 1.6.1 has a NULL pointer dereference in the xar_unserialize function in archive.c.

Record: EUVD-2017-2761
Updated: 2026-11-03

GitHub AdvisoriesGHSA-6jc8-h4qw-9892 9.8

libxar.so in xar 1.6.1 has a NULL pointer dereference in the xar_unserialize function in archive.c.

libxar.so in xar 1.6.1 has a NULL pointer dereference in the xar_unserialize function in archive.c.

Record: GHSA-6jc8-h4qw-9892
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-476
Updated: 2026-11-02

OSV 9.8

libxar.so in xar 1.6.1 has a NULL pointer dereference in the xar_unserialize function in archive.c.

Record: CVE-2017-11124
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2017-11124 9.8

libxar.so in xar 1.6.1 has a NULL pointer dereference in the xar_unserialize function in archive.c.

Record: DEBIAN-CVE-2017-11124
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVopenSUSE-SU-2026:11103-1 No score

libxar-devel-1.8.0.0.503-1.1 on GA media

These are all security issues fixed in the libxar-devel-1.8.0.0.503-1.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2026:11103-1
Updated: 2026-11-02

OSVopenSUSE-SU-2026:21153-1 No score

Security update for xar

This update for xar fixes the following issues:

Changes in xar:

Switch to the maintained Apple xar lineage (build 503, versioned 1.8.0.0.503): the mackyle 1.6.1 fork this package tracked has been dead since 2012, and Debian, Fedora and Gentoo all moved to Apple's xar (apple-oss-distributions/xar). This resolves the long-standing NULL-pointer dereferences in xar_get_path() and xar_unserialize() when parsing malformed archives:
- CVE-2017-11124 (boo#1047875)
- CVE-2017-11125 (boo#1047874)
- CVE-2018-17093 (boo#1108595)
- CVE-2018-17094 (boo#1108596)

Record: openSUSE-SU-2026:21153-1
Updated: 2026-11-02

Affected products

xar project xar

Affected packages

Affected packages
Package	Affected	Fixed
`xar` Debian:13	before 1.8.0.498-1	1.8.0.498-1
`xar` Debian:14	before 1.8.0.498-1	1.8.0.498-1
`xar` openSUSE:Tumbleweed From an advisory covering 4 CVEs	before 1.8.0.0.503-1.1	1.8.0.0.503-1.1
`xar` openSUSE:Leap 16.0 From an advisory covering 4 CVEs	before 1.8.0.0.503-bp160.1.1	1.8.0.0.503-bp160.1.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2017-11124 is a critical vulnerability (CVSS 9.8) in Xar Project Xar, published July 10, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.95%, the 80th percentile. Fixed in xar 1.8.0.498-1.

References

Show 10 moreShow less