CVE-2017-20006: rarlab unrar Out-of-bounds Write
CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2017-20006DEBIAN-CVE-2017-20006
Published 01-07-2021Last modified 05-08-2024
Vulnerability summary
CVE-2017-20006 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in rarlab unrar. EPSS estimates a 1.22% chance of exploitation in the next 30 days, higher than 68.2% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.8/10
010
High · v3.1 (NVD)EPSS score
1.22%
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 1 · Related 1Timeline
- 01-07-2021PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
UnRAR 5.6.1.2 and 5.6.1.3 has a heap-based buffer overflow in Unpack::CopyString (called from Unpack::Unpack5 and CmdExtract::ExtractCurrentFile).
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 7.8Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.22%
Chance of exploitation in the next 30 days
Percentile
68%
Versus all other CVEs
30-day change
0.00 pp
From 1.22% on 19-09-2026
19-09-202619-10-2026
EPSS score1.22%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (bugs.chromium.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian1 product
- unrar-nonfree< 1:5.6.6-1
Rarlab1 product
- unrar5.6.1.2 | 5.6.1.3
Ubuntu1 product
- unrar-nonfreeAll versions (No fix recorded)
3 vendors · 3 products
References
6 links- github.com/google/oss-fuzz-vulns/blob/main/vulns/unrar/OSV-2017-104.yamlX Refsource MISCThird Party AdvisoryREPORT
- bugs.chromium.org/p/oss-fuzz/issues/detail?id=4373X Refsource MISCExploitIssue TrackingPatchThird Party AdvisoryREPORT
- github.com/aawc/unrar/commit/0ff832d31470471803b175cfff4e40c1b08ee779X Refsource MISCPatchThird Party AdvisoryREPORT
