CVE-2018-6797: Buffer Overflow
First published: Wed Feb 21 2018(Updated: )
A flaw was found in Perl 5. A heap write overflow in regcomp.c file might be exploited when a perl program allows user input of patterns. A crafted regular expression can cause the heap buffer overflow, with control over the bytes written.
Credit: Brian Carpenter GwanYeong Kim Brian Carpenter cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Perl Perl | >=5.18<=5.26 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =17.10 | |
| Redhat Enterprise Linux Server | =7.0 | |
| Redhat Enterprise Linux Server | =7.3 | |
| Redhat Enterprise Linux Server | =7.4 | |
| Redhat Enterprise Linux Server | =7.5 | |
| Redhat Enterprise Linux Server | =7.6 | |
| Redhat Enterprise Linux Workstation | =6.0 | |
| Redhat Enterprise Linux Workstation | =7.0 | |
| Apple macOS Mojave | <10.14.1 | 10.14.1 |
| Apple High Sierra | ||
| Apple Sierra | ||
| Apple macOS High Sierra | <10.13.6 | 10.13.6 |
| Apple El Capitan | ||
| redhat/perl | <5.26.2 | 5.26.2 |
| redhat/perl | <5.24.4 | 5.24.4 |
| debian/perl | 5.32.1-4+deb11u3 5.32.1-4+deb11u1 5.36.0-7+deb12u1 5.38.2-5 |
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Reference Links
- http://www.securitytracker.com/id/1040681
- http://www.securitytracker.com/id/1042004
- https://access.redhat.com/errata/RHSA-2018:1192
- https://rt.perl.org/Public/Bug/Display.html?id=132227
- https://security.gentoo.org/glsa/201909-01
- https://usn.ubuntu.com/3625-1/
- https://www.debian.org/security/2018/dsa-4172
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://launchpad.net/bugs/cve/CVE-2018-6797
- https://support.apple.com/en-us/HT209193 (Advisory)
- https://support.apple.com/en-us/HT208937 (Advisory)
- https://perl5.git.perl.org/perl.git/commit/8e6f44c90c7fa1f63c19a44c45482b09a407e15b
- https://perl5.git.perl.org/perl.git/commit/fa889a389ebb8e63782a3697775aa42c63a8f0cd
- https://perl5.git.perl.org/perl.git/commit/8b80ce67ff257aaa36e47eaf4194d27a51595524
- https://perl5.git.perl.org/perl.git/commit/ae187cb6c87b079045274f298fdcf426e4a6404b
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1547783#c2
- https://perl5.git.perl.org/perl.git/commit/
- https://access.redhat.com/security/cve/CVE-2018-6798
- https://access.redhat.com/security/cve/CVE-2018-6797
- https://perl5.git.perl.org/perl.git/commit/abe1e6c568b96bcb382dfa4f61c56d1ab001ea51
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1567778
- https://bugzilla.redhat.com/show_bug.cgi?id=1547783
- https://perl5.git.perl.org/perl.git/commitdiff/abe1e6c568b96bcb382dfa4f61c56d1ab001ea51
- https://perl5.git.perl.org/perl.git/commitdiff/510cc261d965ccfa427900ebb368fc4d337442d2
- https://security-tracker.debian.org/tracker/CVE-2018-6797
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6797
- https://nvd.nist.gov/vuln/detail/CVE-2018-6797
- https://ubuntu.com/security/CVE-2018-6797
Peer vulnerabilities
(Found alongside the following vulnerabilities)
- CVE-2018-4295
- CVE-2018-4410
- CVE-2018-4417
- CVE-2017-12613
- CVE-2017-12618
- CVE-2018-4411
- CVE-2018-4308
- CVE-2018-4468
- CVE-2018-4126
- CVE-2018-4415
- CVE-2018-4398
- CVE-2018-4412
- CVE-2018-4153
- CVE-2018-4406
- CVE-2018-4346
- CVE-2018-4403
- CVE-2018-4423
- CVE-2018-3639
- CVE-2018-4342
- CVE-2018-4304
- CVE-2018-4426
- CVE-2018-4331
- CVE-2018-3646
- CVE-2018-4242
- CVE-2018-4394
- CVE-2018-4334
- CVE-2018-4396
- CVE-2018-4418
- CVE-2018-4350
- CVE-2018-4421
- CVE-2018-4422
- CVE-2018-4408
- CVE-2018-4402
- CVE-2018-4341
- CVE-2018-4354
- CVE-2018-4401
- CVE-2018-4371
- CVE-2018-4420
- CVE-2018-4399
- CVE-2018-4340
- CVE-2018-4419
- CVE-2018-4425
- CVE-2018-4259
- CVE-2018-4286
- CVE-2018-4287
- CVE-2018-4288
- CVE-2018-4291
- CVE-2018-4413
- CVE-2018-4407
- CVE-2018-4424
- CVE-2018-4187
- CVE-2018-4348
- CVE-2018-4389
- CVE-2018-4326
- CVE-2018-4310
- CVE-2018-3640
- CVE-2018-4369
- CVE-2018-6797
- CVE-2017-0898
- CVE-2017-10784
- CVE-2017-14033
- CVE-2017-14064
- CVE-2017-17405
- CVE-2017-17742
- CVE-2018-6914
- CVE-2018-8777
- CVE-2018-8778
- CVE-2018-8779
- CVE-2018-8780
- CVE-2018-4400
- CVE-2018-4395
- CVE-2018-4393
- CVE-2018-4203
- CVE-2018-4368
- CVE-2018-4470
- CVE-2018-4289
- CVE-2018-4268
- CVE-2018-4285
- CVE-2018-5383
- CVE-2018-4293
- CVE-2018-4269
- CVE-2018-4276
- CVE-2018-4178
- CVE-2018-4456
- CVE-2018-4283
- CVE-2018-3665
- CVE-2018-4280
- CVE-2018-4248
- CVE-2018-4277
- CVE-2018-6913
- CVE-2018-4274
Frequently Asked Questions
What is CVE-2018-6797?
CVE-2018-6797 is a vulnerability in Perl 5.18 through 5.26 that allows a crafted regular expression to cause a heap-based buffer overflow.
What is the severity of CVE-2018-6797?
CVE-2018-6797 has a severity rating of 9.8, which is considered critical.
How does CVE-2018-6797 affect Perl?
CVE-2018-6797 affects Perl versions 5.18 through 5.26.
Which software versions are affected by CVE-2018-6797?
CVE-2018-6797 affects Perl versions 5.18 through 5.26 on various operating systems including Ubuntu, Debian, Red Hat, and macOS.
How can I fix CVE-2018-6797?
To fix CVE-2018-6797, update Perl to version 5.22.1-9ubuntu0.3 for Ubuntu, 5.26.0-8ubuntu1.1 for Ubuntu Artful, or the respective fixed versions for other operating systems.
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- version/perl perl/5.26
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