CVE-2017-12940: rarlab unrar Out-of-bounds Read
CVSS: 9.8v3.0CriticalModified
AliasesUBUNTU-CVE-2017-12940DEBIAN-CVE-2017-12940
Published 18-08-2017Last modified 05-08-2024
Vulnerability summary
CVE-2017-12940 is a critical (CVSS 9.8) Out-of-bounds Read vulnerability in rarlab unrar. EPSS estimates a 2.20% chance of exploitation in the next 30 days, higher than 82.1% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.8/10
010
Critical · v3.0 (NVD)EPSS score
2.20%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 4 · Related 2Timeline
- 18-08-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
libunrar.a in UnRAR before 5.5.7 has an out-of-bounds read in the EncodeFileName::Decode call within the Archive::ReadHeader15 function.
CVSS metrics
4 scores · 3 sources · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
2.20%
Chance of exploitation in the next 30 days
Percentile
82%
Versus all other CVEs
30-day change
0.00 pp
From 2.20% on 18-09-2026
18-09-202618-10-2026
EPSS score2.20%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (seclists.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian1 product
- unrar-nonfree< 1:5.5.8-1
Rarlab1 product
- unrar≤ 5.5.6
Ubuntu1 product
- unrar-nonfreeAll versions (No fix recorded)
3 vendors · 3 products
References
7 links- kc.mcafee.com/corporate/index?page=content&id=SB10241X Refsource CONFIRM
