CVE-2020-10543
Published: 1 June 2020
Perl before 5.30.3 on 32-bit platforms allows a heap-based buffer overflow because nested regular expression quantifiers have an integer overflow. An application written in Perl would only be vulnerable to this flaw if it evaluates regular expressions supplied by the attacker. Evaluating regular expressions in this fashion is known to be dangerous since the regular expression engine does not protect against denial of service attacks in this usage scenario. Additionally, the target system needs a sufficient amount of memory to allocate partial expansions of the nested quantifiers prior to the overflow occurring. This requirement is unlikely to be met on 64bit systems.]
Notes
Author | Note |
---|---|
alexmurray | Affects 5.005 to 5.30.2 |
Priority
Status
Package | Release | Status |
---|---|---|
perl Launchpad, Ubuntu, Debian |
bionic |
Released
(5.26.1-6ubuntu0.5)
|
eoan |
Ignored
(end of life)
|
|
focal |
Released
(5.30.0-9ubuntu0.2)
|
|
groovy |
Not vulnerable
(5.30.3-4)
|
|
trusty |
Released
(5.18.2-2ubuntu1.7+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
upstream |
Released
(5.28.3,5.30.3)
|
|
xenial |
Released
(5.22.1-9ubuntu0.9)
|
|
Patches: upstream: https://github.com/perl/perl5/commit/897d1f7fd515b828e4b198d8b8bef76c6faf03ed |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 8.2 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | Low |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H |
References
- https://metacpan.org/pod/release/XSAWYERX/perl-5.28.3/pod/perldelta.pod
- https://metacpan.org/pod/release/XSAWYERX/perl-5.30.3/pod/perldelta.pod
- https://ubuntu.com/security/notices/USN-4602-1
- https://ubuntu.com/security/notices/USN-4602-2
- https://www.cve.org/CVERecord?id=CVE-2020-10543
- NVD
- Launchpad
- Debian