Perl-crypt-openssl-rsa: side-channel attack in pkcs#1 v1.5 padding mode (marvin attack)
A timing-based side-channel flaw exists in the perl-Crypt-OpenSSL-RSA package, which could be sufficient to recover plaintext across a network in a Bleichenbacher-style attack. To achieve successful decryption, an attacker would have to be able to send a large number of trial messages. The vulnerability affects the legacy PKCS#1v1.5 RSA encryption padding mode.
- Published
- Apr 25, 2024
- Updated
- Jun 17, 2026
- EPSS
- 0.5% · 42th percentile
- CWE
- CWE-208
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Report tools
Action score
23
Monitor
Low priority for now.
- CVSS
- 23 / 40 · 5.9 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · redhat
- 5.9
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| redhat | openssl | cpe:2.3:a:redhat:openssl |
Versions reported by the vendor
Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.
github.com/toddr/Crypt-OpenSSL-RSA perl-Crypt-OpenSSL-RSA
- all versionsaffected
Red Hat Red Hat Enterprise Linux 6
- all versionsunknown
Red Hat Red Hat Enterprise Linux 7
- all versionsunknown
Red Hat Red Hat Enterprise Linux 8
- all versionsaffected
Red Hat Red Hat Enterprise Linux 9
- all versionsaffected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | libcrypt-openssl-rsa-perl | all versions | — |
| Debian:13 | libcrypt-openssl-rsa-perl | before 0.35-1 | 0.35-1 |
| openSUSE:Tumbleweed | perl-Crypt-OpenSSL-RSA | before 0.350.0-1.1 | 0.350.0-1.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | perl-Crypt-OpenSSL-RSA | before 0.28-150600.19.3.1 | 0.28-150600.19.3.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | perl-Crypt-OpenSSL-RSA | before 0.28-150600.19.3.1 | 0.28-150600.19.3.1 |
| SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | perl-Crypt-OpenSSL-RSA | before 0.28-10.3.1 | 0.28-10.3.1 |
Same product
red hat: all recordsOther highest-scoring records for the same primary product.
- CVE-2025-12744Abrt: command-injection in abrt leading to local privilege escalation35Monitor
- CVE-2026-90947Gimp: gimp: out-of-bounds write in lighting effects plugin via crafted preset file31Monitor
- CVE-2026-90949Gimp: gimp: heap-based buffer overflow in psp loader due to selection-channel geometry mismatch31Monitor
- CVE-2026-90948Gimp: gimp: heap-based buffer overflow in ico loader via integer overflow in embedded png dimensions31Monitor
- CVE-2025-48796Gimp: stack-based buffer overflows in file-ico29Monitor
- CVE-2026-78322File-roller: file-roller: stack buffer overflow in parse_progress_line for 7z and rar handlers26Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Debian:libcrypt-openssl-rsa-perl | 0.35-1 · Debian:13 | Package registry (OSV) |
| openSUSE:perl-Crypt-OpenSSL-RSA | 0.28-150600.19.3.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| SUSE:perl-Crypt-OpenSSL-RSA | 0.28-150600.19.3.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-208 · Observable Timing DiscrepancyCVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- access.redhat.com/security/cve/CVE-2024-2467
- bugzilla.redhat.com/show_bug.cgi?id=2269567
- github.com/toddr/Crypt-OpenSSL-RSA/issues/42
- people.redhat.com/~hkario/marvin/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.