7.4

CVE-2023-51437: apache software foundation apache pulsar Observable Discrepancy

CVSS: 7.4v3.1HighModified
AliasesGHSA-c57v-4vg5-cm2x
Published 07-02-2024Last modified 02-08-2024
Open JSON

Vulnerability summary

CVE-2023-51437 is a high (CVSS 7.4) Observable Discrepancy vulnerability in apache software foundation apache pulsar. EPSS estimates a 0.76% chance of exploitation in the next 30 days, higher than 54.5% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.76%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 07-02-2024
    PublishedVulnerability first disclosed.
  2. 02-08-2024
    Last modifiedVulnerability information updated.

Description

Observable timing discrepancy vulnerability in Apache Pulsar SASL Authentication Provider can allow an attacker to forge a SASL Role Token that will pass signature verification. Users are recommended to upgrade to version 2.11.3, 3.0.2, or 3.1.1 which fixes the issue. Users should also consider updating the configured secret in the `saslJaasServerRoleTokenSignerSecretPath` file. Any component matching an above version running the SASL Authentication Provider is affected. That includes the Pulsar Broker, Proxy, Websocket Proxy, or Function Worker. 2.11 Pulsar users should upgrade to at least 2.11.3. 3.0 Pulsar users should upgrade to at least 3.0.2. 3.1 Pulsar users should upgrade to at least 3.1.1. Any users running Pulsar 2.8, 2.9, 2.10, and earlier should upgrade to one of the above patched versions. For additional details on this attack vector, please refer to https://codahale.com/a-lesson-in-timing-attacks/ .

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.76%

Chance of exploitation in the next 30 days

Percentile

55%

Versus all other CVEs

30-day change

0.00 pp

From 0.76% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.76%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Apache1 product
  • pulsarEOL≤ 2.10.5 | ≥ 2.11.0, < 2.11.3 | ≥ 3.0.0, < 3.0.2 | 3.1.0 | 3.1.0:candidate_1
Apache software foundation1 product
  • apache pulsar≤ 2.10.5 | ≥ 2.11.0, ≤ 2.11.2 | ≥ 3.0.0, ≤ 3.0.1 | 3.1.0
Org.apache.pulsar1 product
  • pulsar-broker-auth-sasl< 2.11.3 | ≥ 3.0.0, < 3.0.2 | ≥ 3.1.0, < 3.1.1

3 vendors · 3 products

References

10 links