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CVE-2020-7711

Denial of Service (DoS)

7.5 HighFix available

This affects all versions of package github.com/russellhaering/goxmldsig. There is a crash on nil-pointer dereference caused by sending malformed XML signatures.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

1.80%Up 1.2 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 7.5

Denial of Service (DoS)

This affects all versions of package github.com/russellhaering/goxmldsig. There is a crash on nil-pointer dereference caused by sending malformed XML signatures.

Record
CVE-2020-7711
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P
Updated
2026-11-02
EUVDEUVD-2022-7133 7.5

This affects all versions of package github.com/russellhaering/goxmldsig. There is a crash on nil-pointer dereference caused by sending malformed XML signatures.

Record
EUVD-2022-7133
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P
Updated
2026-11-03
GitHub AdvisoriesGHSA-gq5r-cc4w-g8xf 7.5

Duplicate Advisory: gosaml2 is vulnerable to NULL Pointer Dereference from malformed XML signatures

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-prjq-f4q3-fvfr. This link is maintained to preserve external references.

Original Description

This affects all versions less than 0.7.0 of package github.com/russellhaering/gosaml2. There is a crash on null pointer dereference caused by sending malformed XML signatures.

Record
GHSA-gq5r-cc4w-g8xf
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
GitHub AdvisoriesGHSA-mqqv-chpx-vq25 7.5

goxmldsig vulnerable to crash on nil-pointer dereference caused by sending malformed XML signatures

This affects all versions of package github.com/russellhaering/goxmldsig prior to 1.1.1. There is a crash on nil-pointer dereference caused by sending malformed XML signatures. This issue is patched in version 1.1.1.

Record
GHSA-mqqv-chpx-vq25
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
NVD 7.5

This affects all versions of package github.com/russellhaering/goxmldsig. There is a crash on nil-pointer dereference caused by sending malformed XML signatures.

Record
CVE-2020-7711
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-476
Updated
2026-11-02
OSV 7.5

This affects all versions of package github.com/russellhaering/goxmldsig. There is a crash on nil-pointer dereference caused by sending malformed XML signatures.

Record
CVE-2020-7711
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 7 moreShow less
OSVCVE-2020-7731 7.5

This affects all versions <0.7.0 of package github.com/russellhaering/gosaml2. There is a crash on nil-pointer dereference caused by sending malformed XML signatures.

Record
CVE-2020-7731
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2020-7711 7.5

This affects all versions of package github.com/russellhaering/goxmldsig. There is a crash on nil-pointer dereference caused by sending malformed XML signatures.

Record
DEBIAN-CVE-2020-7711
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVGHSA-gq5r-cc4w-g8xf 7.5

Duplicate Advisory: gosaml2 is vulnerable to NULL Pointer Dereference from malformed XML signatures

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-prjq-f4q3-fvfr. This link is maintained to preserve external references.

Original Description

This affects all versions less than 0.7.0 of package github.com/russellhaering/gosaml2. There is a crash on null pointer dereference caused by sending malformed XML signatures.

Record
GHSA-gq5r-cc4w-g8xf
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
OSVGHSA-mqqv-chpx-vq25 7.5

goxmldsig vulnerable to crash on nil-pointer dereference caused by sending malformed XML signatures

This affects all versions of package github.com/russellhaering/goxmldsig prior to 1.1.1. There is a crash on nil-pointer dereference caused by sending malformed XML signatures. This issue is patched in version 1.1.1.

Record
GHSA-mqqv-chpx-vq25
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
OSVGHSA-prjq-f4q3-fvfr 7.5

github.com/russellhaering/gosaml2 is vulnerable to NULL Pointer Dereference

Impact

In versions prior to v0.7.0 it was possible for an attacker to supply an invalid assertion which would trigger a panic due to a nil-pointer dereference.

Patches

The issue was patched in v0.7.0, released on March 2, 2022.

Workarounds

Callers to gosaml2 can use recover() to handle panics to mitigate a potential DoS.

References

See issue #59 for details.

Record
GHSA-prjq-f4q3-fvfr
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
OSVUBUNTU-CVE-2020-7711 7.5

This affects all versions of package github.com/russellhaering/goxmldsig. There is a crash on nil-pointer dereference caused by sending malformed XML signatures.

Record
UBUNTU-CVE-2020-7711
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVGO-2020-0046 No score

Panic due to malformed XML digital signature in github.com/russellhaering/goxmldsig

Due to a nil pointer dereference, a malformed XML Digital Signature can cause a panic during validation. If user supplied signatures are being validated, this may be used as a denial of service vector.

Record
GO-2020-0046
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
github.com/russellhaering/goxmldsig
Go
 before 1.1.1
1.1.1
github.com/russellhaering/gosaml2
Go
 before 0.7.0
0.7.0
golang-github-russellhaering-goxmldsig
Debian:12
 before 1.1.1-1
1.1.1-1
github.com/russellhaering/goxmldsig
Go
From an advisory covering 2 CVEs
 before 1.1.1
1.1.1
github.com/russellhaering/gosaml2
Go
From an advisory covering 2 CVEs
 before 0.7.0
0.7.0
golang-github-russellhaering-goxmldsig
Ubuntu:18.04:LTS
 All versions, plus listed versions
0.0~git20170911.b7efc62-1
 None known
golang-github-russellhaering-goxmldsig
Ubuntu:20.04:LTS
 All versions, plus listed versions
0.0~git20170911.b7efc62-10.0~git20180430.7acd5e4-1
 None known
golang-github-russellhaering-goxmldsig
Ubuntu:22.04:LTS
 All versions, plus listed versions
1.1.0-11.1.1-1
 None known
golang-github-russellhaering-goxmldsig
Ubuntu:24.04:LTS
 All versions, plus listed versions
1.2.0-1
 None known
golang-github-russellhaering-goxmldsig
Ubuntu:25.10
 All versions, plus listed versions
1.2.0-1
 None known
golang-github-russellhaering-goxmldsig
Ubuntu:26.10
 All versions, plus listed versions
1.2.0-1
 None known
golang-github-russellhaering-goxmldsig
Ubuntu:26.04:LTS
 All versions, plus listed versions
1.2.0-1
 None known

History

History
RecordedChangedSources
affected, facts
affected
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-7711 is a high vulnerability (CVSS 7.5) in Goxmldsig Project Goxmldsig, published August 23, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.80%, the 78th percentile. Fixed in github.com/russellhaering/goxmldsig 1.1.1.

References

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