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CVE-2018-25018

UnRAR 5.6.1.7 through 5.7.4 and 6.0.3 has an out-of-bounds write during a memcpy in QuickOpen:...

7.8 HighFix available

UnRAR 5.6.1.7 through 5.7.4 and 6.0.3 has an out-of-bounds write during a memcpy in QuickOpen::ReadRaw when called from QuickOpen::ReadNext.

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
High
Integrity
High
Availability
High

Exploit likelihood

1.31%Up 0.5 points since Jul 1, 2021
90%50%10%1%

What each source reports

NVD Score used 7.8

UnRAR 5.6.1.7 through 5.7.4 and 6.0.3 has an out-of-bounds write during a memcpy in QuickOpen::ReadRaw when called from QuickOpen::ReadNext.

Record
CVE-2018-25018
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0
6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness
CWE-787
Updated
2026-11-02
CVE List No score

UnRAR 5.6.1.7 through 5.7.4 and 6.0.3 has an out-of-bounds write during a memcpy in QuickOpen::ReadRaw when called from QuickOpen::ReadNext.

Record
CVE-2018-25018
Updated
2026-11-02
EUVDEUVD-2018-13799 No score

UnRAR 5.6.1.7 through 5.7.4 and 6.0.3 has an out-of-bounds write during a memcpy in QuickOpen::ReadRaw when called from QuickOpen::ReadNext.

Record
EUVD-2018-13799
Updated
2026-11-03
GitHub AdvisoriesGHSA-64hf-v92v-mrg5 No score

UnRAR 5.6.1.7 through 5.7.4 and 6.0.3 has an out-of-bounds write during a memcpy in QuickOpen:...

UnRAR 5.6.1.7 through 5.7.4 and 6.0.3 has an out-of-bounds write during a memcpy in QuickOpen::ReadRaw when called from QuickOpen::ReadNext.

Record
GHSA-64hf-v92v-mrg5
Weakness
CWE-787
Updated
2026-11-02
OSV 7.8

UnRAR 5.6.1.7 through 5.7.4 and 6.0.3 has an out-of-bounds write during a memcpy in QuickOpen::ReadRaw when called from QuickOpen::ReadNext.

Record
CVE-2018-25018
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2018-25018 7.8

UnRAR 5.6.1.7 through 5.7.4 and 6.0.3 has an out-of-bounds write during a memcpy in QuickOpen::ReadRaw when called from QuickOpen::ReadNext.

Record
DEBIAN-CVE-2018-25018
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2018-25018 7.8

UnRAR 5.6.1.7 through 5.7.4 and 6.0.3 has an out-of-bounds write during a memcpy in QuickOpen::ReadRaw when called from QuickOpen::ReadNext.

Record
UBUNTU-CVE-2018-25018
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
unrar-nonfree
Debian:12
 before 1:5.6.6-1, plus listed versions
1:3.5.2-0.11:3.5.2-0.21:3.5.4-0.11:3.5.4-11:3.5.4-1.1
Show 31 moreShow less
1:3.7.2-11:3.7.3-11:3.7.3-1.11:3.7.8-11:3.7.8-21:3.8.2-11:3.8.4-11:3.8.5-11:3.8.5-21:3.9.10-11:3.9.3-11:3.9.5-11:3.9.6-11:3.9.7-11:3.9.9-11:4.0.2-11:4.0.3-11:4.1.4-11:4.2.4-0.11:4.2.4-0.21:4.2.4-0.31:5.0.10-11:5.2.5-11:5.2.7-0.11:5.3.2-11:5.4.5-11:5.5.5-11:5.5.8-13.3.6-23.3.6-2.0.13.4.3-1
1:5.6.6-1
unrar-nonfree
Debian:13
 before 1:5.6.6-1, plus listed versions
1:3.5.2-0.11:3.5.2-0.21:3.5.4-0.11:3.5.4-11:3.5.4-1.1
Show 31 moreShow less
1:3.7.2-11:3.7.3-11:3.7.3-1.11:3.7.8-11:3.7.8-21:3.8.2-11:3.8.4-11:3.8.5-11:3.8.5-21:3.9.10-11:3.9.3-11:3.9.5-11:3.9.6-11:3.9.7-11:3.9.9-11:4.0.2-11:4.0.3-11:4.1.4-11:4.2.4-0.11:4.2.4-0.21:4.2.4-0.31:5.0.10-11:5.2.5-11:5.2.7-0.11:5.3.2-11:5.4.5-11:5.5.5-11:5.5.8-13.3.6-23.3.6-2.0.13.4.3-1
1:5.6.6-1
unrar-nonfree
Debian:14
 before 1:5.6.6-1, plus listed versions
1:3.5.2-0.11:3.5.2-0.21:3.5.4-0.11:3.5.4-11:3.5.4-1.1
Show 31 moreShow less
1:3.7.2-11:3.7.3-11:3.7.3-1.11:3.7.8-11:3.7.8-21:3.8.2-11:3.8.4-11:3.8.5-11:3.8.5-21:3.9.10-11:3.9.3-11:3.9.5-11:3.9.6-11:3.9.7-11:3.9.9-11:4.0.2-11:4.0.3-11:4.1.4-11:4.2.4-0.11:4.2.4-0.21:4.2.4-0.31:5.0.10-11:5.2.5-11:5.2.7-0.11:5.3.2-11:5.4.5-11:5.5.5-11:5.5.8-13.3.6-23.3.6-2.0.13.4.3-1
1:5.6.6-1
unrar-nonfree
Ubuntu:16.04:LTS
 All versions, plus listed versions
1:5.3.2-11:5.3.2-1+deb9u1build0.16.04.1
 None known
unrar-nonfree
Ubuntu:18.04:LTS
 All versions, plus listed versions
1:5.5.8-1
 None known

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

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

In short

CVE-2018-25018 is a high vulnerability (CVSS 7.8) in Rarlab Unrar, published July 1, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.31%, the 70th percentile. Fixed in unrar-nonfree 1:5.6.6-1.

References

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