How severe is CVE-2019-18603?

CVE-2019-18603 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2019-18603 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-18603?

CVE-2019-18603 primarily affects Openafs. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-18603?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-18603 published?

CVE-2019-18603 was published on 2019-10-29 and last updated on 2026-06-17.

CVE-2019-18603

CVE-2019-18603 is a medium-severity vulnerability in Openafs with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-908.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-908
Affected product: Openafs
Published: 2019-10-29
Last modified: 2026-06-17

Description

OpenAFS before 1.6.24 and 1.8.x before 1.8.5 is prone to information leakage upon certain error conditions because uninitialized RPC output variables are sent over the network to a peer.

Frequently asked questions

What is CVE-2019-18603?: OpenAFS before 1.6.24 and 1.8.x before 1.8.5 is prone to information leakage upon certain error conditions because uninitialized RPC output variables are sent over the network to a peer.
How severe is CVE-2019-18603?: CVE-2019-18603 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2019-18603 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-18603?: CVE-2019-18603 primarily affects Openafs. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-18603?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-18603 published?: CVE-2019-18603 was published on 2019-10-29 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:openafs:openafs:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

More vulnerabilities in Openafs

CVE-2009-1251 — Critical (CVSS 10.0): Heap-based buffer overflow in the cache manager in the client in OpenAFS 1.0 through 1.4.8 and 1.5.0 through 1.5.58 on…
CVE-2018-16947 — Critical (CVSS 9.8): An issue was discovered in OpenAFS before 1.6.23 and 1.8.x before 1.8.2. The backup tape controller (butc) process…
CVE-2024-10397 — High (CVSS 7.8): A malicious server can crash the OpenAFS cache manager and other client utilities, and possibly execute arbitrary code.
CVE-2024-10394 — High (CVSS 7.8): A local user can bypass the OpenAFS PAG (Process Authentication Group) throttling mechanism in Unix clients, allowing…
CVE-2015-8312 — High (CVSS 7.8): Off-by-one error in afs_pioctl.c in OpenAFS before 1.6.16 might allow local users to cause a denial of service (memory…
CVE-2009-1250 — High (CVSS 7.8): The cache manager in the client in OpenAFS 1.0 through 1.4.8 and 1.5.0 through 1.5.58, and IBM AFS 3.6 before Patch 19,…

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Other CWE-908 (Use of Uninitialized Resource) vulnerabilities

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CVE-2023-24941 — Critical (CVSS 9.8): Windows Network File System Remote Code Execution Vulnerability
CVE-2022-26437 — Critical (CVSS 9.8): In httpclient, there is a possible out of bounds write due to uninitialized data. This could lead to remote escalation…
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