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CVE Record

CVE-2013-10031: Plack::Middleware::Session versions before 0.17 for Perl may be vulnerable to HMAC comparison timing attacks

Plack-Middleware-Session versions before 0.17 may be vulnerable to HMAC comparison timing attacks

HighCVSS 7.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

Older Plack::Middleware::Session for Perl may leak information through tiny timing differences when checking HMAC values. For organizations running Perl/Plack web applications with this middleware, the main concern is confidentiality of session-related data. There is no cited evidence of active exploitation.

Executive priority

Treat as a high-priority dependency update for internet-facing Perl applications. Business urgency depends on whether the affected middleware is present. No source confirms active exploitation, so prioritize based on exposure and session sensitivity.

Technical view

The CVE describes an HMAC comparison timing weakness in Plack-Middleware-Session before 0.17. The supplied CVSS 3.1 score is 7.5, network exploitable, unauthenticated, no user interaction, with high confidentiality impact only. The referenced GitHub commit is tagged as the patch.

Likely exposure

Exposure is likely limited to Perl/Plack applications using Plack-Middleware-Session versions before 0.17. Systems not using this package are not indicated as affected. The source data lists version 0.01 but the description says versions before 0.17, so verify actual deployed versions.

Exploitation context

The CVSS vector indicates remote, low-complexity, unauthenticated exploitation potential. The record is not in KEV, and the supplied sources do not cite active exploitation or public weaponization.

Researcher notes

Evidence is sparse. The record states “before 0.17,” while structured affected data only lists 0.01. Use package inventory to confirm exposure and review the linked patch for exact comparison changes. Do not assume broader Plack impact without additional evidence.

Mitigation direction

  • Upgrade Plack-Middleware-Session to 0.17 or later, following maintainer guidance.
  • Prioritize externally reachable Perl/Plack applications using this middleware.
  • If immediate upgrade is blocked, check vendor guidance for supported compensating controls.

Validation and detection

  • Inventory Perl applications using Plack-Middleware-Session.
  • Check installed package versions in runtime environments and dependency lockfiles.
  • Flag any Plack-Middleware-Session version before 0.17 for remediation.
  • Confirm upgraded deployments load the expected fixed package version.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-1254: Exact CWE lookup

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cve · low confidence lookup

CVE-2013-10031 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2013-10031Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
MIYAGAWAPlack::Middleware::SessionPlack-Middleware-Session, 0.01unaffected
Weakness

CWE details

CWE-1254

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-1254 · source CWE mapping

Incorrect Comparison Logic Granularity

Incorrect Comparison Logic Granularity represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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