CVE-2017-14121
The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from...
The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a NULL pointer dereference flaw triggered by a crafted RAR archive. NOTE: this may be the same as one of the several test cases in the CVE-2017-11189 references.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a NULL pointer dereference flaw triggered by a crafted RAR archive. NOTE: this may be the same as one of the several test cases in the CVE-2017-11189 references.
- Record
CVE-2017-14121- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-476
- Updated
- 2026-11-02
CVE List No score
The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a NULL pointer dereference flaw triggered by a crafted RAR archive. NOTE: this may be the same as one of the several test cases in the CVE-2017-11189 references.
- Record
CVE-2017-14121- Updated
- 2026-11-02
EUVDEUVD-2017-5633 No score
The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a NULL pointer dereference flaw triggered by a crafted RAR archive. NOTE: this may be the same as one of the several test cases in the CVE-2017-11189 references.
- Record
EUVD-2017-5633- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-r9qm-gm5q-gx7p
The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from...
The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a NULL pointer dereference flaw triggered by a crafted RAR archive. NOTE: this may be the same as one of the several test cases in the CVE-2017-11189 references.
- Record
GHSA-r9qm-gm5q-gx7p- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-476
- Updated
- 2026-11-02
OSV
The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a NULL pointer dereference flaw triggered by a crafted RAR archive. NOTE: this may be the same as one of the several test cases in the CVE-2017-11189 references.
- Record
CVE-2017-14121- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2017-14121
The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a NULL pointer dereference flaw triggered by a crafted RAR archive. NOTE: this may be the same as one of the several test cases in the CVE-2017-11189 references.
- Record
DEBIAN-CVE-2017-14121- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2017-14121
The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a NULL pointer dereference flaw triggered by a crafted RAR archive. NOTE: this may be the same as one of the several test cases in the CVE-2017-11189 references.
- Record
UBUNTU-CVE-2017-14121- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - CVSS 3.0
- 7.8 High
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
unrar-freeDebian:12 |
before 1:0.0.1+cvs20140707-4 | 1:0.0.1+cvs20140707-4 |
unrar-freeDebian:13 |
before 1:0.0.1+cvs20140707-4 | 1:0.0.1+cvs20140707-4 |
unrar-freeDebian:14 |
before 1:0.0.1+cvs20140707-4 | 1:0.0.1+cvs20140707-4 |
unrar-freeDebian:9 From an advisory covering 3 CVEs |
before 1:0.0.1+cvs20140707-1+deb9u1, plus listed versions 1:0.0.1+cvs20140707-1 |
1:0.0.1+cvs20140707-1+deb9u1 |
unrar-freeUbuntu:Pro:14.04:LTS |
before 1:0.0.1+cvs20071127-2+deb7u1ubuntu0.1~esm1, plus listed versions 1:0.0.1+cvs20071127-21:0.0.1+cvs20071127-2+deb7u1build0.14.04.1 |
1:0.0.1+cvs20071127-2+deb7u1ubuntu0.1~esm1 |
unrar-freeUbuntu:16.04:LTS |
before 1:0.0.1+cvs20140707-4~build0.16.04.1, plus listed versions 1:0.0.1+cvs20140707-1 |
1:0.0.1+cvs20140707-4~build0.16.04.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2017-14121 is a medium vulnerability (CVSS 5.5) in Rarlab Unrar, published September 3, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.12%, the 66th percentile. Fixed in unrar-free 1:0.0.1+cvs20140707-4.
References
bugs.debian.org/874061
openwall.com/lists/oss-security/2017/08/20/1
lists.debian.org/debian-lts-announce/2021/02/msg00026.html
nvd.nist.gov/vuln/detail/CVE-2017-14121
github.com/advisories/GHSA-r9qm-gm5q-gx7p
security-tracker.debian.org/tracker/CVE-2017-14121
ubuntu.com/security/CVE-2017-14121
cve.org/CVERecord?id=CVE-2017-14121